H. L. ARNOLD, M.D.
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The increasing use of oxygen inhalation for long periods in hypoxemic states, and the considerable expense attendant upon the prolonged administration of oxygen from tanks under pressure, emboldens me to report a very inexpensive source of oxygen which is available in practically all large cities.
The now widely used Linde process for the manufacture of oxygen consists of the compression and fractional release of compressed air on a progressive plan leading to the liquefaction of air at a temperature of — 190 C. This liquid when exposed at atmospheric pressure rapidly gives off its nitrogen, since the boiling point of
ARNOLD HL. A Cheaper Source of Oxygen. Ann Intern Med. 1930;3:1157–1158. doi: https://doi.org/10.7326/0003-4819-3-11-1157
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Published: Ann Intern Med. 1930;3(11):1157-1158.
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