This article has been translated from the French of Prof. H. Labbé, the head of the laboratoire à la Faculté de Médecine, in Paris. It reflects a rather characteristic aloofness to any considerations other than scientific or economic. But it will well repay careful study. - [Eds.]

I

Vegetarianism has been the object of many attacks, and has also been warmly defended. Most of its adepts have sought to give the value of a dogma to its practice.

For quite a number of people "vegetarianism" is a kind of religion, requiring of its votaries a sort of baptism, and the sacrifice of many pleasures. It is this which justifies the infatuation of some, and the systematic disparagement of others.

"Vegetalism"[12] cannot pretend to play a similar part, or to lend itself to ambiguity. To be a "vegetalist" is to choose in the vegetable kingdom, with a justified preference, foods susceptible of filling the energy-producing needs, and the needs of the reparation of the human system.

"Vegetalism" is a chapter of dietetic physiology which must utilise the precise methods and recent discoveries of the science of nutrition.

[12] The word "Vegetarianism" implies a judgment of the qualities which such a diet entails. This word is derived, in fact, from the Latin adjective "Vegetus" (strong). The word "Vegetalism," which we oppose to the preceding one, admits only the establishing of a fact, that of the choice - exclusive or preferred - of the nutritious matters in the vegetable kingdom.

II

Before putting "vegetalism" into practice the first point is to know whether the foods of "vegetal" origin contain, and are susceptible of producing regularly, the divers nutritive principles indispensable to the organisation of an alimentary diet. The principles are the following: - Proteid or albuminoid substances; hydrocarbonated and sweet substances fatty substances; mineral matters, alkalis, lime, magnesia, phosphates and chlorides, etc. In most compound foods, no matter of what origin, mineral materials almost always exist in sufficient quantities. The most important amongst them, at all events, are found combined in liberal, even superabundant, portions in dishes of vegetal origin. The analysis of the ashes of our most common table vegetables fixes us immediately to this subject: Leguminous plants supply from about three to six per cent. of ashes, rich in alkalis, lime and phosphates. Potatoes, green vegetables and fruit as a whole absorbing considerable quantities of mineral elements. These are the elements of a nature to allow a precise reply to this question which we propose to expound briefly.

III

In order to examine a food thoroughly, for the purpose of ascertaining if it can be advantageously introduced for consumption, whether albumins, fats, hydrate of carbon, or sugar, etc., or again an association of these principles in a composite article of food are in question, divers researches must be carried out before giving a final judgment.

If a more or less complex article of food is in question, before considering it as a good nutriment, its centesimal composition, or its immediate composition, should be established; its theoretic calorific power should be known, and it should be measured if this has not yet been done.

Besides the calorific yield thus estimated in vitro, the real utilisation in the human organism of articles of food alone or mixed with other foods should be determined, taking simultaneously into account their effects, whether tonic, stimulating or depressing.

From a different point of view it is no longer allowable to neglect before judging whether such and such a nutritive substance is advantageous, the valuation of what we have called, with Prof. Landouzy, the economic yield - that is to say, the price of the energy, provided by the unity of weight of the article of food.

It is only in reviewing "vegetal" substances, taking these divers titles into consideration, that we shall be justified in attributing to the practice of "vegetalism," integral or mitigated, its definite value.

IV

Only a few years ago, when Schützenberger, emulator and forerunner of Fischer, Armand Gautier, Kossel, first disjointed the albuminoid molecule, to examine one by one its divers parts, the composition of the various albumins was very little known. Whether, therefore, albumins of the blood, or those of meat or eggs, were in question, these bodies were hardly ever separated, except through physical circumstances, amongst others by constant quantities of different coagulation. As to the centesimal formula and the intimate structure of the different protoid substances, they could be considered as closely brought together.

From this fact, the physiological problem of the utilisation of albumin was simpler. No matter which article of food contained this albumin, its nutritive power by unity of weight remained the same. At the present time the number of albumins is no longer limited. It is not now physical characteristics founded difficult separations which arbitrarily distinguish those bodies from each other. The individuality of each of the albumins results from its formula of deterioration, under the influence of digestive ferments, or of chemical bodies acting in a similar way, as do mineral acids and alkalis. For want of constituary formula this methodical deterioration makes known the number of molecules (acids or other bodies) which are responsible for the structure of each albumin. These deleterious formula of proteid matter are not less suggestive than composition ones. They reveal notable differences between "vegetal" and animal albumins.

To be sure, animal albumins (beef, veal, mutton, pork, etc.) which we are offered in an alimentary flesh diet, resemble more nearly the structure of our own bodily albumins than do the gluten of bread or the albumin of vegetables. This fact seems actually the best support of the theory which affirms the superiority of the flesh over the vegetable diet. Such a remark is therefore well worth discussing by showing that the consequences which can be deduced from it are paradoxical, and rest upon hypothesis which, not very acceptable in theory, are hardly verified in practice.