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he is at rest. The skins of a horse when put to ^[[the]] trot, gives off 170 times as much as when it is at rest &c. &c. do. [[encircled]] 275-276 [[/encircled]] oxygen gas &c. We actually have to a certain extent upon, & are fed by, the air wh. surrounds us. [[encircled]] 278 [[/encircled]] If a fat animal be stinted in its food or be wholly deprived of nourishment for some days its weight will rapidly diminish [[encircled]] 279 [[/encircled]] Human fat consist of carbon [[strikethrough]] & two of oxygen [[/strikethrough]] hydrogen & oxygen in the proportions represented by C H O 34 36 5 & it is transformed into carbonic acid & water in the following manner see [[encircled]] 280 [[/encircled]] [[end page]] [[start page]] Given fat in its food & the fat of its own body will suffer no dimininution XXX If instead of fat we give it food containing much starch or sugar ^[[(or gum)]] a similar result will follow [[encircled]] 281 [[/encircled]] Among the constituents of the food above ^[[alluded]] to as similar to starch in being converted into carbonic acid & water by the oxygen inhaled, are ardent spirits or alcohol [[encircled]] 282 [[/encircled]] Internal heat of a healthy man in temperate climate is about 98°F It is a further provision for the maintenance of human life, that in a case of emergency the gluten