"Cavendish solved the problem... and whilst he avoided the confusion in which it involved others, he built upon it an additional great discovery. After ascertaining that the appearance of nitric acid was not dependent on the source from which the oxygen was prepared, and that the acid did not show itself unless more than a combining measure of oxygen was detonated with the hydrogen, he traced its production to the presence in the [eudiometer] of a little nitrogen, derived from the atmospheric air which had originally filled it, or had become mingled with the hydrogen and oxygen during their preparation or collection. He... verified this conclusion, by showing that the artificial addition of nitrogen to hydrogen, mixed with more than one-half its volume of oxygen, increased the amount of nitric acid produced at each detonation, and on the other hand, that if the hydrogen instead of the oxygen was in excess, no nitric acid appeared, although nitrogen was present."
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The Life of the Honble Henry Cavendish
The Life of the Honble Henry Cavendish Including Abstracts of His More Important Papers, and a Critical Inquiry into the Claims of all the Alleged Dicsoverers of the Composition of Water by George Wilson, M.D., F.R.D.E. Lecturer on Chemistry, Edinburgh, was published in 1851. It was written at the request of the Cavendish Society, and contains an authoritative biography of Henry Cavendish, a general sketch of his scientific researches and discoveries, as well as a discussion supporting Cavendish
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