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Excerpt from Indian Corn as Food for Man: Digestion Experiments With Chestnuts Carbohydrates. These bodies are by far the most abundant in the vegetable kingdom, the amounts in our animal foods being too small to call for notice. The term includes the sugars and starches and also the woody matter of plants, or cellulose. The sugars are very readily digested as are the starches when prop erly cooked. The cellulose in the older plant tissues is not easily digested by man. This hardened cellulose constitutes the crude fiber of the chemist. The term nitrogen - free extract is often used to denote all the carbohydrates less the crude fiber. Heat of combustion. The protein, fats, and carbohydrates, so far as they are digested, are all oxidized or burned in the animal body with the production of heat and body energy. The protein is not fully oxidized in the body, but produces, pound for pound, as much heat and energy as the carbohydrates. The fats are the greatest heat producers, yielding weight for weight, 2% times as much energy as the protein or carbohydrates. The heat of combustion of a food material is the heat produced by its oxidation. The energy thus developed is measured by calories, a calorie being the amount of heat required to raise one kilogram of water through one degree C., or about one pounds through four degrees F.136 maine agricultural experiment station. 1906. The ash or mineral matter of a food is what remains behind after the oxidation is complete. Being already fully oxidized it can furnish no energy, although the ash constituents may be absolutely essential to the animal. In the table below is given the average composition of the principal cereals used for food. The analyses are quoted from Bul. 13, Part 9, Bureau of Chemistry, U. S. Department of Agriculture. With the exception of the rice, the analyses represent American grown grains. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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