Abstract
IN August last some tubes were filled at low pressure by an improved process with the more volatile gases of the atmosphere.2 The air was liquefied directly from that above the roof of the Royal Institution by contact at atmospheric pressure with the walls of a vessel cooled below -200° C. When about 200 c.c. of liquid had condensed, communication with the outer air was closed by a stop-cock. Subsequently communication was opened, through another stop-cock, with a second, vessel cooled by immersion in liquid hydrogen, and a part of the liquid from the first vessel, maintained at -210°, was allowed to distil into the second still colder vessel. When about 10 c.c. had condensed in the solid form in the second vessel, communication with the first vessel was cut off, and a manometer showed a pressure of gas of about 10 to 15 mm. of mercury.
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References
In this paper we describe researches in continuation of those previously communicated to the Society by one of us, in a paper entitled "Application of Liquid Hydrogen to the Production of High Vacua, together with their spectroscopic Examination." Roy. Soc. Proc. vol. 64, p. 231.
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Spectroscopic Investigations of Gases in Atmospheric Air 1 . Nature 63, 189–190 (1900). https://doi.org/10.1038/063189a0
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DOI: https://doi.org/10.1038/063189a0