A new anti-friction metal

• Book ID: 104117923
• Publisher: Elsevier Science
• Year: 1912
• Tongue: English
• Weight: 58 KB
• Volume: 173
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(12)90489-5

✦ Synopsis

Owing to its small vapor pressure at the melting point, it is not possiblc, with ordinary airpumps, to obtain solid oxygen by evaporation of the liquid, as is the case with hydrogen or nitrogen. If, however, purc liquid oxygen, contained in a propcrly-isolatcd vessel, be subiectcd to the exhaust produced by a quantity of charcoal kept at about the temperature of boiling oxygen, the pressure is lowered to such an extent that the oxygen solidifies to a transparent jelly. The vapor pressure at the melting point appears to be between i.ii 5 and 1.125 ram. Taking 1.12 ram. as correct, the melting point of oxygen as calculated by the method of Rankinc or Willard Gibbs is 53 ° to 55 ° absolute. A direct determination of the melting point by means of a small hydrogen gas thermometer gave the value of 54 ° absolute.