Carbotoxicity

It is customary to consider glycosuria under two forms : First .—A milder manifestation of the disease in which only small amounts of sugar appear in the urine, and these often intermittently; while the general health of the patient suffers little or no disturbance. Second .—A more severe type of the disease characterized by excessively saccharine urine, great thirst, polyuria, emaciation, etc., leading more or less rapidly to extreme marasmus and death. The first form is chiefly of reflex origin, and hence its milder type and rarely fatal termination ; while the second form is doubtless of central origin, and consequently more pronounced and serious in its consequences. In a systematic consideration of the management of glycosuria it is important that these two types of the malady be constantly kept in mind.

Physiological chemistry has shown us that glycosuria expresses itself chiefly through disturbance of the glycogenic function of the liver. Claude Bernard extended our knowledge a step farther, and showed that the elemental cause consists of some disturbance of the central nervous system, closely corresponding to the vasor-motor centre. All attempts, however, to unravel the nature of this disturbance through the aid of morbid anatomy have proved thus far entirely futile. It is well to remember, however, that in careful scientific research, failure often teaches us valuable lessons, and, indeed, often furnishes useful information. The very fact that the study of morbid anatomy in glycosuria has failed to reveal uniform and tangible lesions of the central nervous system goes far to form a presumption that if lesions exist in these cases they can scarcely be sufficiently grave in themselves to cause fatal results. Our present knowledge of the nature and course of glycosuria is quite in harmony with this presumption ; for indeed we find the cause of death uniformly to depend upon the perverted function of organs widely apart from the brain. Moreover, if the perverted function of these organs can be corrected and held under control the patient may survive almost indefinitely.

Without entering into the discussion of the many theoretical questions with which, unfortunately, our knowledge of glycosuria is at present so deeply involved, let us more practically inquire, What facts have we at command upon which to base a rational system of managing the disease ? We know that the chief expression of glycosuria is a perverted elaboration of the hydrocarbon foods in the liver, resulting in their conversion into grape-sugar. We know that the surcharging of the blood with large quantities of this sugar, not only gravely alters the nutritive qualities of the blood ; but it is also liable to induce chemico- toxic changes in that fluid, which are dangerous to life. We know, in short, that the perverted elaboration of so large a proportion of the food supply as that of the hydrocarbonaceous, the saturation of the tissues with the resulting morbid products, and the necessary efforts at their elimination, lead to altered nutrition, emaciation, wasting of the vital forces of the economy, secondary disease of important organs; and to that complex of morbid processes that in glycosuria bring about exhaustion and death. Now, obviously, if we can succeed in cutting off completely the supply of such foods as are prone to faulty elaboration—for the most part the hydrocarbons —we shall not only arrest the perverted liver function ; but we shall also save the system from the damaging effects of the morbid products poured into it through faulty elaboration of food, and thus practically arrest the regressive changes that lead to such grave results.

If we had to deal only with the purely hydrocarbon foods as the exclusive source of sugar production in the economy, our problem would be a comparatively simple one; since a thoroughly nourishing and sustaining diet can be furnished exclusive of these. But while the hydocarbons are the chief, they are not always the only source of sugar production. Experimental investigation has shown that when animals were fed on purely nitrogenous foods—even for lengthy periods of time—a small amount of glycogen still continued to be present in their livers. In the most grave forms of diabetes, the “ sugar-forming vice” of the organism becomes so strong that the liver seems capable of splitting up a portion of the nitrogenous foods, and even of the albumenoids of the tissues, and of transforming a part of these into sugar. Fortunately such cases are for the most part long- neglected or advanced ones. Although much may be accomplished even here in retarding the disease, yet it may, as a rule, be considered progressive towards a fatal termination.

The sugar-forming powers of the organism in glycosuria are feeblest in their operation upon nitrogenous materials ; indeed in the early stages of the disease it is probable that these always escape sugar transformation. Next in order come the green parts of certain vegetables, which very strongly resist sugar transformation. The hydrocarbons offer the least resisting power of all foods to sugar transformation, and of this class starch is the most dangerous element.

Practically then the more completely we are able to eliminate the hydrocarbons from the food supply in glycosuria, the more completely will we be able to bring and to hold the disease under control. Certain allowances must lie made for individual idiosyncrasies, as well as for a few exceptional articles of diet, which'experience has shown us are sometimes well borne—even when their classification would seem to contraindicate their use. To speak more accurately then, the more completely we are able to supply the system with that which it can appropriate as nourishment, and at the same time the more completely we can eliminate that which is convertible into sugar the more successful will be the treatment. Now, in view of the above facts, which I have endeavored to present as carefully separated from theoretical speculations as possible, it seems indeed strange that more earnest efforts are not made in the management of glycosuria—especially in the more pronounced types of the disease—to supply more nearly that diet upon which almost alone depends the improvement or cure of these cases. I shall first point out what seem to me the more prominent errors commonly made in dieting in the severe type of the disease, giving a list of the admissible foods ; after which I shall note some of the liberties of diet that may be indulged in the milder reflex forms ; and lastly, I shall refer to the influence of drugs over the disease.

First in importance comes the question of bread, some form of which containing starch is permitted in all the diet lists I have seen. Now I do not hesitate to state, without fear of successful contradiction, that all the so-called diabetic flours, breads, and cakes in the market of which I have any knowledge, are loaded with hydrocarbons. They are “ a snare and a delusion,” and have unquestionably shortened the lives of thousands. Most samples of gluten flour, from which the starch is claimed to have been eliminated—or nearly so—contain from 20 to 40 per cent, of starch. I saw in Dr. Pavy’s laboratory in London a few months since an analysis of one of the so-called diabetic flours on sale in our markets, which showed the starch contents to be nearly 60 per cent. Long before I became aware of these facts I found that I could not control typical cases of diabetes if I permitted the use of commercial flours so-called “diabetic.” I need scarcely add that with the above figures before me I have discarded them altogether.

The withdrawal of bread from the diet usually constitutes the most serious deprivation the diabetic patient has to encounter, although the appetite for bread is more largely a matter of taste and habit than of necessity. Some patients become quite reconciled to the change after a few weeks and do not mind it, but usually the craving for bread of some kind remains more or less strong, and will not be supplanted by the use of other foods. In the latter class of cases, if strict dieting be demanded, I permit the moderate use of bread made from almond flour as first practiced, I believe, by Dr. Pavy. The almond is absolutely free from starch, but contains about 6 per cent, ot sugar. The latter may be eliminated by boiling the meal in acidulated water for an hour or so and then straining it. The almond meal is not on sale in the markets; the large percentage of its contained oil (50 per cent.) renders it unfit for keeping sufficiently long for commercial purposes. In my own practice I direct the meal to be made as required by means of mills especially constructed for the purpose. Almond flour, when beaten up with eggs, may be raised with the aid of a little baking powder, and baked in small tins in an oven, and the resulting bread is relished by most of my patients as equally palatable with ordinary bread. It should be borne in mind that almond bread, as indeed all substitutes for common bread, should be used in moderation ; otherwise patients deprived of other luxuries of food fly to the permitted bread with an avidity seemingly born of the thought that it is indeed the “staff of life’’ instead of merely a substitute therefor. To make a substituted article of diet go further than the original one is more than is to be expected, even in these practical days, and yet I am led to believe that the failure in accomplishing this in the case of almond bread has led to its unjust condemnation by some in these cases.

The next question of importance in diet—and one upon which authorities greatly differ, is the propriety of the use of milk in diabetes. Dr. Donkin, perhaps the most enthusiastic advocate in its favor, published a book in 1871, which was devoted to the exclusive use of milk as a means of treating this disease. In England Dr. Donkin's so-called “ milk cure ” has met with few if any weighty supporters; on the contrary, many advocate the total exclusion of milk from the diet. My own experience in the use of milk in the treatment of diabetes began nine years ago since which time I have made thorough and varied trials of it, both as an exclusive and as an adjunct diet. My conclusions are that milk is successful chiefly—perhaps only—in milder forms of the disease, such as I have termed reflex cases.

Such cases are, as a rule, controllable by moderate limitations of diet, which offer greater range and nutritive power than does milk. In the more severe type of the disease I have repeatedly found when the diet was rigidly restricted, save in the use of milk, that the total exclusion of the latter without other change caused a prompt reduction, and often the disappearance of sugar from the urine.

Milk contains a very considerable amount of sugar (lactine), about half an ounce to each pint, and Dr. Pavy observes that this animal hydrocarbon “comports itself in the intestinal canal precisely as does grape-sugar.” There can be little doubt, therefore, that in the more pronounced type of diabetes requiring a strict diet, milk should be excluded from the list.

There is a form of glycosuria that occurs in obese and over-nourished subjects, in which the amount of sugar in the urine is usually small, and probably largely due to the ingestion of more hydrocarbons than the system is able to appropriate. Such cases are benefited, and indeed often cured, by a course of fasting. The “ milk cure ” consisting of the exclusive use of skimmed milk is likely to benefit such cases because it is, in fact, a system of starving.

Skimmed milk alone is not sufficient to long maintain proper nourishment to the organism. In pronounced diabetes of central origin, where the assimilative powers of the system are weakened, and more or less emaciation has already set in, it would, therefore, seem absolute folly to confine the patient to skimmed milk, for under such circumstances death from inanition must be but a question of a short time. Sir Wm. Roberts records three cases which he subjected to the ‘ ‘ milk cure ’ ’ with the result that they all succumbed in a short time My own experience is similar to Dr. Roberts’, save that I ceased to use it as an exclusive diet after seeing my first patient rapidly sink under its employment. It is important to bear in mind that lactine is confined to the whey, and consequently the other derivatives of milk—as cheese, cream, curds and butter—are unobjectionable.

Another food of animal source contraindicated in diabetes is liver. The liver of animals contains considerable sugar, as might be expected, considering the glycogenic function of that organ. Not only should the liver of quadrupeds be avoided, but certain fish, especially oysters and the interior of crabs and lobsters, since they possess proportionately very large livers. It has been claimed that this precaution is more in keeping with theory than practice, but a sufficient answer is furnished in the fact that analyses of oysters have shown as high a range as io per cent, of sugar.

The very wide distribution of starch and sugar throughout the vegetable kingdom renders our selection of food from this source limited indeed. In strict dieting we are obliged to avoid nearly the vyhole list of table vegetables. One class only are we at all safe in drawing upon—greens—and these with caution. Green vegetables fortunately consist mostly of cellulose and contain little, sometimes no starch or sugar. They are rendered still safer if boiled before being eaten ; the hot water further ensuring the absence of starch and sugar.

The starch and sugar composition of vegetables varies somewhat. This variation depends much upon the degree of cultivation, and the nature of the climate and soil in which they are produced. As a rule, a high degree of domestic cultivation favors an increase of starch and sugar, while high temperature and sunny skies have an opposite tendency. Among the least objectionable vegetables may be mentioned spinach, lettuce, olives, cucumbers, mushrooms, .Brussels sprouts, turnip tops, water-cresses, cabbage, cauliflower, and the green ends of asparagus. Nearly all nuts are unobjectionable, chestnuts forming an exception.

In the matter of beverages the diabetic patient will scarcely encounter very serious restrictions, since the range permitted includes most of those in domestic use, including many which fall within the line of luxuries. Among these may be mentioned tea, coffee, all mineral waters, pure spirits, as brandy, whisky, gin, and such wines as claret, Rhine wine and Burgundy,

Having briefly reviewed the food products applicable in glycosuria, I shall now enumerate the list I employ in dieting patients upon strict principles, as appropriate in the more severe type of true diabetes of central origin.

STRICT DIABETIC DIET.

Meats of all kinds except livers; beef roasted, broiled, dried, smoked, cured, potted, or preserved in any way except with honey, sugar, or prohibited vegetables. Mutton, ham, tongue, bacon, sausages. Poultry and game of all kinds. Soups made from meats, without flour or prohibited vegetables. Eggs, butter, cheese, pure cream, curds, oil, gelatine and unsweetened jellies. Fish of all kinds except oysters and the inner parts of crabs and lobsters. Bread, biscuits, and cakes made from almond flour. Spinach, lettuce, olives, cucumbers, mushrooms, water-cresses, green cabbage. Almonds, walnuts, Brazil nuts, filberts, butternuts, cocoanuts. Salt, vinegar and pepper.

Drinks , tea and coffee, mineral waters, whisky, gin and brandy, in moderation. Claret and Rhine wine. In mild forms of glycosuria some additions may be safely made to the above diet, and often with advantage. Since in such cases the sugar-forming powers of the organism are weaker ; or, in other words, the assimilative powers for sugar and starch are greater, it is only necessary to limit, not to curtail the hydrocarbons. It seems necessary, therefore, to have at hand to draw upon a supplementary list of foods, which contain but limited amounts of these agents. The selection from the supplementary list should always be made with care; indeed, it should be almost as much a matter of experiment as rule, since we encounter wide differences in individual cases. Thus levulose— fruit sugar—is often well assimilated in the milder form of the disease, and this permits the inclusion of certain fruits in the supplementary list.

SUPPLEMENTARY DIET.

Cabbage, celery, radishes, cauliflower, green string beans, coldslaw, kraut, young onions, tomatoes, cranberries, apples if not sweet, milk in moderate quantities, and bran bread or gluten bread well toasted.

The discovery of saccharin has furnished us an admirable substitute for sugar, since this agent possesses a sweetening power nearly 300 times greater than that of sugar, and a flavor quite as agreeable and pleasant. The tablet form in which saccharin is now put up is very convenient for sweetening coffee, tea, and other beverages. Constant use of saccharin in practice for over a year has convinced me that it is entirely harmless in these cases.

The method of dieting diabetic patients is of scarcely less importance than the quality of the diet itself. In order to more accurately determine the effects of diet upon the disease, no so-called specific medicines should be administered until the sugar excretion is reduced as far as is possible by diet alone. Step by step the more objectionable foods should be cut off until sugar ceases to appear in the urine, or until we reach almost —indeed in some cases an absolute—animal diet. Of course, where patients have been enjoying all the luxuries of a diet range comprising our modern resources of food-supply and culinary arts, an abrupt change to a strict diabetic diet would carry with it more or less danger, and therefore such course is never advisable. The first step should consist in the exclusion of potatoes, sugar, and farinaceous foods, except leaving the patient the liberty of using a moderate amount of bread thinly cut and well toasted on both sides. With these restrictions the patient should continue without other changes for about two weeks. In the milder cases this “ first step ” in dieting will have caused a reduction of the sugar in the urine to relatively small proportions; indeed, in sotne cases it completely vanishes. If sugar still appears in the urine—especially if in considerable quantities— under the above restrictions, we may know that the disease is at least of moderately severe type, and we should proceed to the next step in the diet. This should consist in the exclusion of milk, and all vegetables save green ones. Greater care should be exercised in the use of bread; white bread should be forbidden, and some substitute employed that contains less starch. Gluten or bran bread may be tried, but always toasted, as this alters its contained starch, so that it is not so readily converted into sugar.

After two weeks’ adherence to the above restrictions, if sugar still appears in the urine beyond mere traces, we may be sure that we have to deal with the disease in its more severe type, and we must accordingly bring to bear against it all onr resources of diet in the most strict form. Everything containing starch or sugar that can be avoided, should be strictly forbidden. This last step should be entered upon rather more gradually than the others. Milk, if previously permitted, should now be replaced by pure cream. Cabbage, celery, radishes and string beans should be exchanged for spinach, lettuce, water-cresses, olives and cucumbers. Lastly, apples, tomatoes and all fruits should be avoided, and, with the exception of almond bread, some nuts and a few greens, the patient is reduced to an animal diet. Upon these restrictions, properly carried out, we shall find a large proportion of diabetic patients cease to excrete sugar with their urine, and with this result nearly all the symptoms of the disease will disappear.

In exceptional cases, even after a fair trial of the above restrictions sugar still appears in the urine, but it rarely exceeds i per cent. Under such circumstances the patient should be placed upon an absolutely animal diet, at least for a time. It will be found that a strictly animal diet will often remove these last traces of sugar from the urine, and after its continuance for a longer or shorter time, a reversion to some of the less objectionable articles of the vegetable order causes no reappearance of sugar in the urine.

The three classes of proximate principles that are neces- sary to be understood in the intelligent study of the food- stuffs, and in the selection of the most efficacious diet in disease are best divided into three distinct divisions ; the inorganic, the CHO, and the CHNOS compounds, or a first, second, and third class. 

First. The inorganic substances, such as water, the phosphates, chlorides, carbonates, sulphates, etc., etc. These chemical compounds all enter the body under their own form, either alone or in combination with the other two classes. They are not oxidized or split up within the system to enter into the chemical formation of other com- pounds, but are united mechanically with the proteid group, in fact, their whole action is, as it were, mechanical. After having served their purpose to the body they pass out of the system with the excretions absolutely unchanged in their composition. All medicinal compounds of a corresponding compo- sition and nature probably act in a similar mechanical manner. 

Second. The CHO substances which have for their chemical composition the elements carbon, hydrogen, and oxygen only as fat, sugar, and starch. These substances are all oxidized or split up within the system, yielding heat, energy, lubrication, and rotundity only, and are finally eliminated from the body as carbon dioxide and water. The medicinal agents of like chemical construction probably are oxidized and broken up to yield their effects by a similar cycle of changes. 

Third. The CHNOS substances or those which have for their chemical composition the elements carbon, hydrogen, nitrogen, oxygen, and sulphur. The common representatives of this group are called proteids, or the albuminous parts of milk, eggs, meats of all kinds, which chemically and histologically include fish, lobsters, crabs, turtles, oysters, clams, etc., also poultry and game. The nitrogenous or albuminous parts of all plant life, which is now commonly called vegetable proteid, is included in this class. 

All these nitrogenous substances, irrespective of specific names, are somewhat slowly oxidized or split up within the system and are absolutely essential to form the different constituents of all the fluids, tissues, glands, and ferments of the body, being united mechanically in varying proportions with water and the mineral salts. 

When these proteid bodies are normally transformed, their excrementitious products are urea, uric acid, kreatinine, carbon dioxide, and water in certain and definite proportions. If for any reason there is an abnormal transformation along this line of proteid metabolism, the relative quantity of urea falls and the uric acid rises. By closely studying these urinary changes and intelligently interpreting them, there is furnished an almost exact key to the perfection or imperfection of the oxidization processes and the nutritive condition of the body. By this method of study it is positively known whether the food-stuffs are absorbed and properly utilized by the system or not. 

Another important phenomena to be remembered in connection with the oxidization of the proteid substances is the fact that a disturbance in their anabolism not only changes the relative proportions between the urea and the uric acid, but tends to develop an almost unlimited number of katabolins, some of which are perfectly inert, while others are as toxic and dangerous to life as the well-known cyanide compound prussic acid. 

The action of the CHNO medicinal agents can he explained largely upon the same principles and chemical laws that govern the usefulness of the proteid bodies. 

With an intelligent conception of these three classes of proximate principles and what results are obtained for the system by their perfect and what by their imperfect oxidization, a comparative table of the common substances rated as food-stuffs is instructive. This table subdivides each kind of food product into its three distinct classes of principles. The inorganic compounds, however, are subdivided into water and the inorganic salts, so that their true position may be more clearly elucidated and the whole subject made plainer. 

[[Table 1]] 

Having in this brief manner outlined the composition of the food-stuffs and intimated at the same time the absolute necessity of understanding thoroughly the chemical and physiological laws that control their usefulness within the system, it becomes possible to advance a step further and state the quantities necessary for the most perfect nutritive condition. 

It also shows clearly how, by indulging too freely in any kind of food or by an unwise selection of the various kinds of proximate principles, the digestive system is constantly overtaxed, assimilation imperfectly effected and a host of diseased conditions developed. These abnormalties are brought about in the most insidious and often almost inappreciable manner, until, in some instances, well-defined symptoms are established by which a distinct name can be applied to the condition before attention is attracted to the malady. In a much larger percentage of the cases, however, the symptoms presented are so vague and changeable that the most learned specialist cannot possibly name the condition and sharply define the abnormalty so that it can be differentiated from many other states of a similar nature. Yet it is perfectly clear to every one, patient and practitioner, that something is decidedly wrong with the physiological mechanism of the system. 

Briefly stated, it may be assumed that the following table, No. II., gives a pretty close and satisfactory basis how the first and second classes of proximate principles should be arranged as to the relative proportions needed of each, from bare subsistence up to the largest amount of mental and physical work. 

[[Table 2]]

Before advancing any further in this physiological problem of food and nutrition, it must be admitted that the oxygenating capacity of the system is a limited one — but, fortunately for the human race, it has a moderately wide margin. There frequently comes a time, however, when this margin is exceeded, which is usually brought about by eating too large quantities of all kinds of food or too freely of the CHO classes of food-stuffs — as fat, sugar, and starches — or of both. As a natural sequence one of three things of necessity follows. 

First. The respirations and circulation must be increased to supply more oxygen or the food-stuffs will be imperfectly oxidized. But Nature has set a limit upon the actions of the heart and lungs so that complete relief cannot be granted in this manner. 

Second. The red blood corpuscles must be increased in number or empowered to carry more oxygen, or the absorbed food-stuffs will be imperfectly oxidized. But here again Nature has set a limit upon the number and carrying capacity of these anatomical bodies so that relief in this direction is wanting. 

Third. The super-abundance of food-stuffs absorbed must be incompletely oxidized because the system has no means by which the extra amount of oxygen required can be furnished. This statement applies with special force to che proteid bodies on account of well-established chemical laws, which show that the CHO elements are quickly and completely transformed under all circumstances while the CHNOS are only perfectly transformed when everything is most favorable. The CHO compounds, as fat, sugar, and starch, are rapidly and easily oxidized, consequently they are the first elements to be changed, and they are also completely transformed into their final products ; this tends to leave a deficient quantity of oxygen to act upon and accomplish the more difficult task of carrying the nitrogenous com- pounds through their cycle of change and finally into perfect excrementitious substances. This defective supply of oxygen disturbs the perfect metabolism of the proteid bodies and produces an unlimited number of katabolins and furnishes a rational explanation for many, if not all, of the pathological conditions and symptoms that have to be treated. At least it is fair to assume that so long as the anabolic processes of the body are perfectly effected, no pathological lesion or abnormal symptom can be developed. Keeping constantly in mind the table indicating the relative proportions existing between the proteids and the CHO compounds, or the fats, sugars, and starches, and studying a little more closely the composition and comparative merits of the various food products, much valuable information is brought to light. 

First. It is found almost impossible to arrange a mixed or vegetable diet so as to obtain the requisite amount of proteid elements without at the same time taking more than the needed quantity of the CHO compounds, that is, without introducing more than can be safely utilized or oxidized. 

Second. It is found that with an exclusive meat diet composed of the ordinary average meat almost the exact quantities of both the CHNOS and CHO compounds can be obtained from bare subsistence up to that for forced work. Taking four ounces of pure proteid matter as the standard amount required in twenty-four hours to perfectly maintain the constructive forces of the system, the following tables are quite instructive, viz. :

 [[Tables 3-7]] 

Examples of this kind might be multiplied almost ad infinitum. With all of the tables, however, excepting Table No. VI., there is clearly shown a larger quantity of the CHO compounds than is found of proteid elements. This shows that with almost all kinds of food-stuffs and especially when taken in excessive quantities the system is liable to receive a superabundance of the CHO substances. The ease with which the requisite amounts of proteid matter can be rightly adjusted to meet the demands of the system is clearly demonstrated. These tables just as clearly illustrate that it is almost impossible to arrange any form of the mixed food-stuffs in such a manner that the system will not be constantly super- charged with the stimulating and non-nutritious compounds of CHO construction. 

TABLE VIII. 

This comprehensive comparative diet table, compiled and used by Prof. William H. Porter, of the New York Post-Graduate Medical School, has been worked out upon the atomic basis of the proximate principles, which enter into the construction of the ordinary food-stuffs. 

It proves quite conclusively that Professor Porter's animal diet yields all that can be obtained by the use of a mixed diet containing the three elements — proteid, fat, and carbohydrate. 

In fact, in the proportions as here given, it calls for the use of a little more oxygen than the mixed diet based upon the proportions given by Moleschott ; it also yields a little more carbon dioxide and water. 

When it is remembered, however, that in the egg and the ordinary run of good meat, the proteid element is always a little more abundant than the fat, this excess of oxygen used — when taking an ordinary animal diet — will not be required, and the increased amount of carbon dioxide and water will not be produced, but the total results in excrementitious products cast off and the amount of heat and so-called energy evolved will come so very close to the amounts obtained by using Moleschott's mixed diet, that the two are practically the same. 

The conclusion, therefore, is that the relative proportions of these two elements, proteid and fat, as commonly found in eggs, meat, and fish, come so nearly to the required physiological demands of the system that, in this class of food-stuffs, there is found an almost perfect standard for diet. By adding a very small allowance of bread and butter, it becomes absolutely perfect. 

These chemical facts, based upon the atomicity of the Sood elements, explain the higher nutritive vitality developed in the carnivora as compared with the herbivora and vegetable feeding classes. 

Again, in diseased conditions where the nutritive powers are severely overtaxed, the proteid and fat diet is especially serviceable, for by its use the expenditure of vital force in transforming the food-stuffs is kept at the lowest possible standard. Because, in the use of animal fat to the exclusion of the carbohydrates, the system is spared the necessity of laying out force and oxygen to convert the starch and various sugar elements into a diffusible glucose, and then into an alcoholic-like compound before they can be utilized by the animal economy for the production of heat and the so-called energy, which is finally computed in foot pounds of work accomplished. 

This great saving in vital force by the exclusive use of fat — to supply the CHO elements necessary to produce the heat and energy required — is unquestionably the exact factor that enables the system to effect the cure in all the pathological conditions, which otherwise could not be carried on to a complete recovery. 

These same laws make Kumysgen one of the most valuable food products ever produced, because it has been found, that only about one-half of the fat contained in milk is capable of being absorbed, and with the lactose converted into an alcoholic compound there is developed in Kumyss or Kumysgen, particularly in the latter, a partially predigested food-stuff which contains about equal quantities of proteid and fat in a state to be readily absorbed. This then corresponds exactly with the requirements found in Professor Porter's table, which consists of only proteid and fat. 

Practical experience has long since taught that this form of dieting was the only kind available in connection with the successful treatment of the acute diseases. 

This table is further a demonstration and confirma- tion from a chemical and physiological standpoint, of what has been so often repeated in a clinical way, that upon this purely proteid and fat diet, together with the administration of suitable medicinal agents, the most aggravated forms of digestive disturbances can be quickly removed, nutrition improved, and a healthy standard permanently re-established. They show conclusively that this form of animal diet yields the largest working power to the system for a given amount of food taken, and a similar amount of oxygen used to carry the food substances through their anabolic cycle of changes, and finally form and discharge from the body the resulting excrementitious products.

At this point, however, it may be well to mention that the standard amount of proteid matter taken, in the construction of all these tables, was 130 grammes — 4.5 ounces. Moleschott's original diet-table contained only 120 grammes or (4.2 ounces), but as almost all observers agree quite closely as to the amount of proteid material necessary to be used, and also as to the results obtained from its oxidization, the same quantity was used in all instances that a more exact comparison might be established. The chief difference of dispute, however, is in relation to the relative value of the fats and carbohydrates, and particularly in reference to the latter compounds. 

In trying to develop out of a purely vegetable diet, anything like the same amount of working power for the system that is obtainable by the use of Porter's or Moleschott's diet, almost double the amount of proteid had to be taken with the proportionate rise in the fat and starch as is contained in the vegetable chosen. 

To produce the same amount of work by using a vegetable diet necessitates the outlay of a much larger amount of oxygen, and the production and handling by the glandular structures of the body of an excessive amount of the nitrogenous excrementitious elements. These facts illustrate quite conclusively the manner in which the damage to the system is brought about by indulging too freely, or living exclusively upon a cereal or vegetable compound. 

The vegetable proteid in these tables is further given an undue advantage, to which it is not justly entitled, by crediting it with the same atomic formula as that possessed by an animal proteid ; since the nitrogenous element found in plant-life contains a much larger number of nitrogen atoms, and consequently requires more vital force and oxygen to digest and assimilate it. This naturally decreases rather than improves the nutritive value of the proteid compound of vegetable origin. 

An average of a compound fat molecule is taken as the working standard in all these tables. 

Attention is also directed to a probable error in the rating of the heat-producing power of the carbohydrate. It is & commonly stated, that the comparative oxygenating capacity of a carbohydrate and fat is as one to two and one-half, but by their chemical atomicities, it is as one to thirteen, or thirteen and one-half in favor of the fat. 

That such an error exists in the computations in Moleschott's standard is sustained by a comparative study of the atomicities of the food-stuffs used in both Porter's and Moleschott's diet tables, and of the amount of oxygen required for complete oxidization in both instances. In the former, or Porter's proteid and fat diet table, a little more oxygen is needed than is necessary in Moleschott's mixed diet* yet it is claimed that in the latter instance 393,170 kilogramme-metres or 54,358 more foot pounds of work is produced. This, however, is directly opposed by the smaller quantity of oxygen used in the oxidization processes. When this error in work, produced out of the carbohydrates in Moleschott's diet, is corrected in accordance with the difference in atomicity and the amount of oxygen used between the fat molecule and the carbohydrate molecule represented as glucose, and a computation is made in accord with the correction, a slight difference in work produced when living on a Moleschott's or Porter's diet, is found to exist. The increase in work produced, however, is now found to exist in connection with Porter's diet and is in accord with the larger amount of oxygen used, which makes atomicity, oxygen used, and work produced correspond, while the reverse was stated in the calculations formerly made in connection with Moleschott's diet. 

If this error be true, as it appears to be, the profession have been sadly misguided in all their attempts in the construction of diet tables starting with Moleschott as their standard. 

On the other side, if these chemical and physiological laws be true, as based upon the atomicity of the proximate principles, by carefully considering the percentage composition of each food product to be used, exact results can be obtained. Another point to which attention is called by Dr. Porter is this, that the factors 1.812 and 3.841, which are used in computing the kilogramme-metres in Table VIII., are taken from Frankland — Philosophical Magazine XXXII., and are those which are generally quoted in all scientific works upon physiological chemistry and upon diet. 

In studying the proximate principles, however, by the atomicities, and considering the amount of oxygen required to completely transform a fat molecule into its final products of excretion water and carbon dioxide and a proteid molecule into its final products of excretion — urea, uric acid, kreatinine, carbon dioxide, water, etc. — it is found that only eighteen (18) more oxygen elements are used in the complete oxidization of the fat than in that of the proteid molecule. The computed amount of work performed by the oxidization of the fat molecule is found to be 530 foot pounds as compared to 250 foot pounds for the complete oxidization of the proteid molecule. This makes the eighteen (18) more elements of oxygen used in transforming the fat molecule result in the production of 280 more foot pounds of work than is obtained from the eighteen less used in the proteid. 

From this a decided discrepancy is quite evident between the results obtainable by former calculations and those based upon our modern chemical atomicities. 

However, for an illustrative and comparative study of the working power obtainable from the use of the various food-stuffs, this table is still of great value, as the same figures are used in each and all the calculations. 

As these same factors, 1.812 and 3.841, appear in all the modern scientific works, they were retained in the arrangement of this table, but not without appreciating and calling attention to this discrepancy when the computation is based upon the atomicities of the food elements used, the amount of oxygen required, and the results obtained. 

Again, it must be remembered that the proteids are not directly transformed into their final products, but undergo a series of intermediate changes, all of which require the use of oxygen and must of necessity yield more or less heat and energy, so that all our estimates are approximate. 

When upon Moleschott's diet with the proteid substances raised to the common standard of 130 grammes and the carbohydrates rated in accord with the correction previously noted, it requires 36,115 oxygen elements to produce 678,270 kilogramme-metres or 93,773 foot pounds of work. 

When upon Porter's diet of proteid and fat, it requires 38,415 oxygen elements to produce 734,890 kilogrammemetres or 101,602 foot pounds of work. When upon a purely vegetable diet that will yield anything like the requisite amount of work that can be obtained by using Moleschott's or Porter's diet, it requires 47,191 oxygen elements to produce 742,018 kilogramme-metres or 102,587 foot pounds of work. 

To obtain the 63,748 more kilogramme-metres or 8,814 foot pounds of work out of the vegetable diet as compared with Moleschott's diet, it requires the expenditure of 11,076 more oxygen elements. 

To obtain the 7,128 more kilogramme-metres or 985 foot pounds of work out of the vegetable diet as compared with Porter's diet, it requires the expenditure of 8,776 more oxygen elements. The vegetable diet in both instances yielding an excessive amount of nitrogenous excretory matter, carbon dioxide, and water. 

A careful study of Table II. and VII., and Porter's diet in Table VIII., proves beyond a question of doubt that upon an exclusive diet of our ordinary average meat alone very nearly the required proportions of the proteids or CHNOS compounds and of the fat or CHO element can be established. 

The only defect in the perfection of Table VII. and VIII. is found in the saline column, which contains much more mineral matter than perfect physiological laws indicate are required. This excess in saline or inorganic compounds, however, appears to be true in all kinds of food products — that is, if the proportion of salts in the milk is taken as the guide for a working basis. The reason for looking upon the amount of salts in the milk as the guide to the maximum quantity required is based upon the fact that during the infant period of life, where milk forms the only source of food supply, bone formation is most rapidly progressing, and the amount of mineral matter needed by the system is at its height and much larger than at any other period of life. The bones continue to grow and become fully and perfectly developed with the ordinary quantity of mineral matter contained in the milk. 

Physiology also teaches that a little less than one ounce of mineral salts are required daily by the system, but in all the tables given, except the one containing milk alone, the amount of salts is fully up to or more than an ounce. 

The only great objection that can be raised to an exclusive meat diet is the lack of variety, but that is quite easily adjusted by varying the kinds of meat used. The perfection of the proportionate composition of the proximate principles when using a meat diet, the smaller liability to imbibe an excessive quantity of any one kind and the little danger that there is of taking an excess of the CHO or stimulating and non-nutritious compounds, clearly establishes the fact that in meat we approach the nearest to an ideal food. 

If attention is turned for a single moment to the lower orders of the animal kingdom, it is quite apparent that the most supple and intensely powerful organisms are found among the carnivora only. This tends to substantiate the high utility of the meat diet. Another interesting point is the almost universal absence of tuberculosis among meat-eating animals, while the vegetable-feeding class are specially prone to suffer from this fatal malady. 

Again, the milk which is so generally considered as being fully equal to all the demands of the system, and especially so during the first few months of infant life, might be brought forward as proof positive and clearly illustrating the fact that nature calls for an excess of the CHO elements, because in the composition of the milk it is found that the CHO substances are about twice as abundant as the proteid or CHNOS elements. When these facts are examined a little more closely and scientifically, it is found that the pancreatic gland and its ferment-forming bodies are imperfecty developed at this period of life. Consequently, the fat, if emulsified and rendered capable of being absorbed by the lacteals of the villi, must have this transformation effected almost exclusively by the biliary fluid alone. It is further taught that the biliary secretion acts but little, if at all, upon vegetable fats and that it has the power to effectually emulsify only about one-half of the total quantity of animal fat introduced into the alimentary canal. This being true, fifty per cent, of the fat contained in the milk, together with the bile constantly flowing into the alimentary tract, is unquestionably utilized by the system as a natural laxative principle, and is undoubtedly the chief method by which nature effectually maintains the regular movements of the bowels and produces the daily evacuations so characteristic of a perfectly healthy infant. 

The proportionately larger size of the liver in a child as compared with an adult also points to the fundamental importance of the hepatic gland and its secretion as a necessary agent of prime importance in the infant; the large size of the liver compared with other organs also indicates its great importance during adult life. 

How much of the lactose — which is the form of sugar introduced in the milk — is inverted into glucose and rendered capable of being absorbed and utilized is an open question. In fact, there is no very reliable data upon this important point, but what is to be found upon the subject indicates quite positively that a considerable quantity of the lactose is not changed so as to be utilized by the system, but passes off with the faeces. Therefore, when the scientific truth is clearly appreciated, it is found that the relative proportion between the CHO and the CHNOS elements contained in the milk and that which can gain access to the vascular channels and be of service to the system is not far from equal in amount the major quantity, perhaps a little on the side of the CHO substances or in favor of the fat and sugar. Then, again, the infant requires a little more of the heat-producing compounds during the first few weeks or months than is needed a little later on or in adult life, because the proportionate amount of energy expended is greater in the infant and child than is the case during the adult period of life. Very early in the infant life there is comparatively little muscular action by which heat and energy can be evolved, while a large amount of heat is needed to maintain a perfect physiological condition, and for a time warmth must be artificially supplied. These conditions will admit of a little excess of the CHO elements during this period of life , but when the stage of infant muscular activity commences its never-ceasing motion, then the proportionate amount of the proteid substances must be raised and the CHO, or fat and sugar lowered, if the most perfect type of physiological development is to be effected. 

Observing clinical phenomena a little more closely, it is quite apparent, as life advances, that milk is not equal to the demands of the system, and a more strongly proteid diet is urgently called for by nature. Eggs and lean meat must next be added to furnish this much-needed proteid pabulum for the constructive purposes of the animal economy, and out of which alone the most perfect muscles, glands, ferment bodies, and brain tissue can be formed. 

By this process of reasoning, it is clearly and well established that even with the commonly supposed typical food-stuff, milk, it is not sufficiently perfect in its composition to thoroughly sustain the nutritive economy under all circumstances, but must have added to it a more liberal proteid pabulum. It is also clearly demonstrated that a portion of this excessive amount of fat is not taken up by the circulatory or lymphatic system but is used largely by nature as a laxative agent.

Proceeding a step further in the investigation of the clinical facts bearing upon this most interesting subject and there is found quite a common tendency among people at large to add to the nutritive supply of the infant not the most serviceable kind of food-stuffs in the way of an animal proteid of some kind, but on the contrary the more general practice is that of adding a cereal or vegetable compound, — one in which the CHO elements are very greatly in excess of the demands of nature. Another important point to be remembered in this connection is the well established fact that, although the proteid of vegetable origin, while in quite sufficient quantities, is a much higher nitrogenous compound and, as a rule, is far more difficult of digestion than a proteid body derived from the animal kingdom. 

By this method of infant feeding in which an excess of the fat, sugar, and starch or CHO compounds are used, a natural taste and habit of eating food derived largely from ficially supplied. These conditions will admit of a little excess of the CHO elements during this period of life , but when the stage of infant muscular activity commences its never-ceasing motion, then the proportionate amount of the proteid substances must be raised and the CHO, or fat and sugar lowered, if the most perfect type of physiological development is to be effected. Observing clinical phenomena a little more closely, it is quite apparent, as life advances, that milk is not equal to the demands of the system, and a more strongly proteid diet is urgently called for by nature. Eggs and lean meat must next be added to furnish this much-needed proteid pabulum for the constructive purposes of the animal economy, and out of which alone the most perfect muscles, glands, ferment bodies, and brain tissue can be formed. By this process of reasoning, it is clearly and well established that even with the commonly supposed typical food-stuff, milk, it is not sufficiently perfect in its composition to thoroughly sustain the nutritive economy under all circumstances, but must have added to it a more liberal proteid pabulum. It is also clearly demonstrated that a portion of this excessive amount of fat is not taken up by the circulatory or lymphatic system but is used largely by nature as a laxative agent. Proceeding a step further in the investigation of the clinical facts bearing upon this most interesting subject and there is found quite a common tendency among people at large to add to the nutritive supply of the infant not the most serviceable kind of food-stuffs in the way of an animal proteid of some kind, but on the contrary the more general practice is that of adding a cereal or vegetable compound, — one in which the CHO elements are very greatly in excess of the demands of nature. Another important point to be remembered in this connection is the well established fact that, although the proteid of vegetable origin, while in quite sufficient quantities, is a much higher nitrogenous compound and, as a rule, is far more difficult of digestion than a proteid body derived from the animal kingdom. By this method of infant feeding in which an excess of the fat, sugar, and starch or CHO compounds are used, a natural taste and habit of eating food derived largely from the vegetable kingdom is engendered. The natural sequence is, that on through life the individual is apt to continue eating excessively of all kinds of food-stuffs and particularly those of the CHO and vegetable class. This poorly nourishes the body; adipose tissue in abundance is often acquired from the imperfectly transformed foodproducts. The appetite increases because the system is not properly sustained. The individual continues eating more and more until finally the marginal capacity of the system for supplying oxygen is reached and passed, digestion is imperfectly effected, and the oxidization powers of the body exceeded.

VI. GOUT (Podagra)

Definition. A nutritional disorder, associated with an excessive formation of uric acid, and characterized clinically by attacks of acute brltis, by the gradual deposition of urate of soda in and about the joints, and by the occurrence of irregular constitutional symptoms. 

Etiology. — It is now generally recognized that the disease depends upon disturbed metabolism ; most probably upon defective oxidation of nitrogenous food-stuffs. 

Among important etiological factors in gout are the following: 

(a) Hereditary Influences — Statistics show that in from fifty to sixty per cent of all cases the disease existed in the parents or grandparents. The transmission is supposed to be more marked from the male side. Cases with a strong hereditary taint have been known to develop before puberty. The disease has been seen even in infants at the breast. Males are more subject to the disease than females. It rarely develops before the thirtieth year; and in large majority of the cases the first manifestions appear before the age of fifty, 

(b) Alcohol is the most potent factor in the etiology of the disease. Fermented liquors favor its development much more than distilled spirits, and it prevails most extensively in countries like England and Gennany, which consume the most beer and ale. Probably the greater tendency of malt liquors to induce gout is associated with the production of an acid dyspepsia. The lighter beers used in this country are much less liable to produce gout than the heavier English and Scotch ales, 

(c) Food plays a role equal in importance to that of alcohol. From the time of Hippocrates overeating has been regarded as a special predisposing cause. The excessive use of food, particularly of meats, disturbs gastric digestion and leads to the formation of lactic and volatile fatty acids. It is held by Garrod and others that these tend to decrease the alkalinity of the blood and to reduce its power of holding urates in solution. A special form of gouty dyspepsia has been described. A robust and active digestion is, however, often met in gouty persons. Gout is by no means confined to the rich. In England the combination of poor food, defective hygiene, and an excessive consumption of malt liquor makes the "poor man's gout" a common affection.

(d) Lead. Garrod has shown that workers In lead are specially prone to gout. In thirty per cent of his hospital cases the patients had been painters or workers in lead. The association is probably to be sought in the production by the poison of arteriosclerosis and chronic nephritis. Something in addition is necessary, or certainly in this country we should more frequently see cases of this kind so common in London hospitals. Chronic lead-poisoning here frequently associated with arteriosclerosis and contracted kidneys, but acute arthritis is rare. Gouty deposits are, however, to be found, in the big-toe joint and in the kidneys in those cases. 

There are three theories with reference to gout :

(1) The Uric-acid Theory. — Sir Alfred Garrod, to whom the profession is indebted for so many careful studies in this disease, showed that there was an increase in the uric acid in the blood, due either to increased production or to diminished elimination ; and that the alkalinity of the blood was also lessened. He attributes the deposition of the urate of soda the diminished alkalinity of the plasma, which is unable to hold it in solution. An increase in the quantity of the uric acid produced, or any interference with elimination through the kidneys, may cause a sudden outbreak. The acute paroxysm is due to an accumulation of the urates the blood, which he believes are responsible also for the preliminary dyspepaia, the coated tongue, the irritability of temper, and the general feelings of malaise. The sudden deposit of the cryst;itline urates about thf joint leads to inflammation. {H) The 

Nervous Theory. — The view of Cullen that gout was primarily an affection of the nervous system has been modified into a neuro-humoral view which has been advocated particularly by Sir Dyce Duckworth. On this theory there is a basic, arthritic stock-a diathetic habit, of which gout and rheumatism are two distinct branches. The gouty diathesis is expressed in a neurosis of the nerve-centres, which may be inherited acquired; and (b) "a peculiar incapacity for normal elaboration within the whole body, not merely in the liver or in one or two organs, of food, whereby uric acid is formed at times in excess, or is incapable of being duly transformed iuto more soluble and less noxious product. (Duckworth). The explosive neuroses and the influence of depressing circumstances, physical or mental, point strongly to the part played by the nervous system in the disease.

(3) Ebstein's Theory. — A nutritive tissue disturbance is the priflii change leading to necrosis, and in the necrotic areas the urates are posited. This is not unlike the view of Ord, who holds that there a tendency, inherited or acquired, to a special form of tissue degent tion. 

Morbid Anatomy. — The hold shows an excces of uric acid, as proved originally by Garrod. The uric acid may be obtained from the blood-serum by the method known as uric-acid thread experiment, or from the serum obtained from a blister....The primary change, according to Ebstein, is a local necrosis, due to the presence of an excess of urates in the blood. This is seen in the cartilage and other articular tissues tissues in which the nutritional currents are slow. 

Symptoms.--Gout is usually divided into acute, chronic, and irregular forms.

Treatment-- Individuals who have inherited a tendency to gout, or who have shown any manifestions of it, should live temperately, abstain from alcohol, and eat moderately. An open-air life, with plenty of exercise and regular hours, does much to counteract an inborn tendency to the disease.

Diet--Experience has shown that a modified nitrogenous diet is the most suitable. Starchy and saccharine articles of food are to be taken in very limited quantities; as "the conversion of anatized food is more complete with a minimum of carbohydrates than it is with an excess of them-in other words, one of the best means of avoiding the accumulation of lithic acid in the blood is to diminish the carbohdyrates rather than the anotized foods" (Draper).

Meats of all kinds, except perhaps the coarser sorts, such as pork and veal, and salted provisions, may be used. Eggs, oysters, and f ish may be taken. Lobsters and crabs, particulary when made into salaids, are to be eschewed. The sugar should be reduced to a minimum. The sweeter fruits should not be taken. L Oranges and lemons may be allowed. Strawberries, bananas, and melons should not be eaten. If necessary, saccharin may be substituted. for cane sugar. Potatoes should be sparingly used. The fresh vegetables, such as lettuce, cucumbers, tomatoes, and cauliflower, may be taken freely. Hot rolls and cakes of all sorts, hominy, grits, and the more starchy forms of prepared foods are not suitable. The various articles of diet prepared from corn should be avoided. Fats are easily digested and may be taken freely. In obstinate cases great benefit is derived with an exclusively milk diet. 

Persons with a gouty tendency should be encourage to drink freely of such mineral waters as they prefer. They kep the interstitial circulation active and so favor elimination. Milk and potash-water form a pleasant and wholesome drink for a lithamic patient. Alcohol in all forms should be avoided. When from any cause a stimulant is indicated, claret, dry sherry, or good whisky is preferable. Champagne is particularly pernicious. Persons with a marked tendency to lithaemia should be urged to restrict the appetite and to take only a moderate amount of food. Overeating is not far behind excessive drinking in its injurious effects. Indeed, a majority of people over forty years of age take more food than is required to maintain the equilibrium of health. Gout, in many cases, is evidence of an overfed, overworked, and consequently clogged machine.

In the chronic and irregular forms of gout the treatment by hygiene and diet is most suitable.