. Appendix to Captain Parry's journal of a second voyage [microform] : for the discovery of a north-west passage from the Atlantic to the Pacific, performed in His Majesty's ships Fury and Hecla in the years 1821-22-23. Science; Botany; Sciences; Botanique. 241 ON THE EFFECT OF COLD UPON THE GASES AND DIFFERENT SUBSTANCES. The gases experimented upon, were confined in long cylindrical vessels of thin glass, hermetically sealed. Other specimens of the gases were also sent out in large glass spheres, and condensed by pressure, to render the circum- stances of the experiments, when combined with
. Appendix to Captain Parry's journal of a second voyage [microform] : for the discovery of a north-west passage from the Atlantic to the Pacific, performed in His Majesty's ships Fury and Hecla in the years 1821-22-23. Science; Botany; Sciences; Botanique. 241 ON THE EFFECT OF COLD UPON THE GASES AND DIFFERENT SUBSTANCES. The gases experimented upon, were confined in long cylindrical vessels of thin glass, hermetically sealed. Other specimens of the gases were also sent out in large glass spheres, and condensed by pressure, to render the circum- stances of the experiments, when combined with very low temperatures, more favourable; some of these spheres were provided with stop-cocks of brass, and the others of glass, which circumstances are mentioned in the experiments; and to prevent mistakes, all the vessels had the names of the gases they con- tained, engraved upon them with a diamond. The results here given, are those occasioned by simple exposure to the atmosphere (unless stated.) The vessels before exposure, were wiped perfectly clean and dry upon the outside, and the spots and blemishes in the glass, or any particular appearance within, (if any,) were carefully written down; so that no effect upon the gases should be registered, but what was due to the change of temperature. It may be observed here, th?.t a minute crystallization appeared in everyone of the vessels upon the exposure to low temperatures; which may, in some, have been occasioned by some previous humidity in the vessels, although every precau- tion was taken in filling them in England to prevent it. However this may be, I have given the appearances and circumstances connected with them as well as I was able, so as to enable others to form their own judgment. SuLPHLRots Acid Gas, Upon exposure to â 2G° Fahrenheit, is condensed into a perfectly white fluid; when exposed to â 40°, the condensation is increased, and the liquid runs in streams down the sides of the vessel. Two or three drops
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