Locomotive cylinder castings

• Publisher: Elsevier Science
• Year: 1911
• Tongue: English
• Weight: 63 KB
• Volume: 172
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(11)90241-5

✦ Synopsis

524

CURRENT TOPICS. which cannot exist in the pure state without also partly polymerizing, which Sutherland has named hydrol, and which is formed of simpler molecules than those of ice. Therefore, water is a solution of ice in hydrol. In considering this hypothesis it must be admitted that the molecule of ice is (H20)~. J. Duclaux studied this question by new methods and arrived at different conclusions. He found that ice polymerizes approximately as (H~O)9, M. Wt. 162, to (H_oO)12, M. Wt. 216. These numbers were obtained by the study of the variation of the expansion of water with the pressure; if the variations of the compressibility with the temperature are calculated, the numbers found for the molecule of ice agree with the formulas (H~O),, M. Wt. lO8, and (H20)2,, M. Wt. 414. By com-binir~g the formula of expans~ion given by R/Sntgen for water:

V ~ a + bT + cT 2 + dT s ....