This historic book may have numerous typos and missing text
Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1847 edition. Excerpt: ... the stop-cock, took one inspiration. This gas, in passing through his mouth and fauces, burnt his throat, and produced such a spasm in the epiglottis, as to cause him instantly to desist, when, in breathing the common air, aqua-fortis was really formed in his mouth, which burnt his tongue, palate, and injured his teeth. Mr. D. says, I never design again to repeat so rash an experiment. But though this expeiiment might not be repeated, there was one other nearly as dangerous, to which Mr. Davy''s love of science prompted him to resort; not by trying it on another, but, generously, on himself. Mr. Davy wished to determine whether the carburetted hydrogen gas, was so destructive to animal life as had been represented. In its pure state, one inspiration of this gas was understood to destroy life, but Mr. D. mixed three quarts of the gas, with two quarts of the atmospheric air, and then breathed the whole for nearly a minute. This produced only slight effects, (nothing to an experimental chemist;) merely giddiness, pain in the head, loss of voluntary power, &c. The spirit of inquiry not being to be repressed by these trifling inconveniences, Mr. Davy was now emboldened to introduce into his green bag, four quarts of carburetted hydrogen gas, nearly pure. After exhausting his lungs in the usual way, he made two inspirations of this gas. The first inspiration produced numbness and loss of feeling in the chest. After the second, he lost all power of perceiving external things, except a terrible oppression on his chest, and he seemed sinking fast to death! He had just consciousness enough to remove the mouth-piece from his unclosed lips, when he became wholly insensible. After breathing the common air for some time, consciousness was restored, and...