Licence: Public Domain Mark
Credit: An essay on respiration. Pts I-II / By John Bostock, M.D. Source: Wellcome Collection.
Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.
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![number of trials made upon his own refpiration, he found, that 100 cubic inches of atmofpheric air, after having once pafled through the lungs, had loft between 4 and 5 parts of oxygene, hence he calculates, that 31*6 cubic inches of oxygene are confumed in a minute; (a) this will give 45504 inches in 24 hours, a quantity which will weigh ] 5471 ■ 36 grains, (b) This efti- mate coincides nearly with that of M. Lavoifier, though it was obtained by a different procefs and by the ufe of a different apparatus ; we may therefore conclude, that between 45, and 46,000 cubic inches, or about 15500 grains, 2lbs. 8oz. troy, is the average quantity of oxygene con- fumed by a man in 2,4 hours. Having afcertained the proportion of oxygene which is confumed in refpiration, it next remains to determine the quantity of carbonic acid gas, which is produced. It appears that Dr. Black firft demonftrated its exiftence in air which was emitted from the lungs, and that M. Lavoifier, afterwards examined it with more accuracy, and found that the air in which an animal had ex- pired, contained about 4 of its bulk of carbonic acid gas. (c) In the experiment which this phi- lofopher (a) Davy's Researches, p. 431—4. Note 36. (c) Mem. Acad. 1J/7.](https://iiif.wellcomecollection.org/image/b2129916x_0100.jp2/full/800%2C/0/default.jpg)
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