Researches, chemical and philosophical : chiefly concerning nitrous oxide, or diphlogisticated nitrous air, and its respiration / by Humphry Davy.

  • Davy, Humphry, Sir, 1778-1829.
Date:
1800
Catalogue details

Licence: Public Domain Mark

Credit: Researches, chemical and philosophical : chiefly concerning nitrous oxide, or diphlogisticated nitrous air, and its respiration / by Humphry Davy. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    enter at the fame time, as the increafe of weight was 4],5 grains. The dark orange of the globe diminifhed rapidly ; it became warm at the bottom, and moifl on the fides. After a few minutes the color had almoft wholly difap- peared. To afcertain the quantity of aeriform fluid abforbed, the globe was again attached to the mercurial air apparatus, containing 140 cubic inches of common air. When the communi- cation was made, 51 cubic inches rufhed in, and it gained in weight l6,5 grains. A quantity of fluid equal to 54 grains was now taken out of the globe. On examination it proved to be flightly tinged with green, and occupied a fpace equal to that filled by 41,5 grains of water. Its fpecific gravity was con- fequently 1,301. To afcertain if any unabforbed aeriform ni- trous acid remained in the globe, 13 grains of folution of ammonia were introduced in the fame manner as the water, and after fome mi- nutes, when the white vapor had condenfed,