But it is not in water alone that these pernicious earthy matters are found. All food substances contain them to a greater or lesser extent. The order in which foods stand in the matter of freedom from earthy impurities is as follows: Fruits, fish, animal flesh (including eggs), vegetables, cereals; so that the advocates of a strictly vegetable diet find themselves confronted by the formidable fact that their mainstay is that class of foods that contain the largest proportion of those substances that hasten ossification. Ample proof is at hand that a strictly vegetable diet results in what is known as atheroma (chalky deposit), an affection of the arteries. Dr. Winckler, an enthusiastic food reformer, who wrote extensively on the subject under the nom de plume of Dr. Alanus, and practised a strict vegetarian diet for some years, was compelled to abandon it, on account of the above disease manifesting itself. Numerous similar cases were observed by Raymond, in a monastery of vegetarian friars, and among the poorer Hindoos, who live almost exclusively on rice, this trouble is of frequent occurrence. The reason of this is obvious. Vegetable food is richer in mineral salts than animal food, and consequently, more are introduced into the blood. There are exceptions, for instance, fruits, which are an ideal food, for several excellent reasons. To commence with, they contain less earthy matter than any other known organic substance; they contain upward of 70 per cent, of the purest kind of distilled water--distilled in Nature’s laboratory; and distilled water is an admirable solvent, and is ready for immediate absorption into the blood, and, lastly, the starch of the fruit has, by the sun’s action, been converted into glucose, and is practically ready for assimilation. In point of nutritive value, fruits may be classed in order as follows: Dates, figs, bananas, prunes, apples, grapes. Bread has long been known as the “staff of life,” and although it forms the main dietary staple for large numbers of people, that does not in any way prove its eligibility as an article of food. We have seen that cereals contain a very large proportion of inorganic matter (the mineral salts), and wheat is as richly endowed in this respect as any of its fellows. Wheat is rich in heat producing qualities, which is due to the quantity of starch it contains. Now, this starch must be converted into glucose before the system can appropriate it, and as exhaustive experiments have shown that not more than four per cent. of the starch is converted by the ptyalin in the saliva, the principal work of dealing with the starch devolves upon the duodenum, or second stomach, the fluids of the main stomach having no action upon it.