May, 1925
19Db-STRIAL A1YD E S G I S E E R I S G CHEJIISTRY
obtainable from these equations are accurate to =tZ per cent from 0" C. to the boiling point. Bibliography Haur, Z . Elektrochem., 16, 301 (1910). Briggs, J. SOC.Chem. I n d . , 22, 1275 (1903). Brlinsted, Z . physik. Chem., 68, 707 (1910); 64, 641 (1908). Burt, J . Chem. Soc. (London), 86, 1339 (1904). Daudt, Z . physik. Chem., 106, 226 (1923). Dieterici, W i e d . Ann., 42, 613 (1891); SO, 47 (1893); 62, 616 (1897); 67, 865 (1899). Ferguson, J . SOC.Chem. Ind., 24, 781 (1905). Hacker, A n n . P k y s i k . , [41 39, 1342 (1912). Helmholtz, Wied. Ann., 27, 532 (1886). Lunge, Ber., 11, 370 (1878). Regnault, A n n . chem. phys., [3] 16, 129 (1845).
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Roscoe, J . Chem. SOC. (London), 13, 146 (1860) Thomas and Ramsay, I b i d . , 123, 3256 (1923). Raleigh, Phil. Mag., [SI 4, 521 (1902). Smits, Z . physik. Chem., 39, 385 (1902); 61, 33 (1905); Arch. iVbeuland. sci., 121 1, 97 (1898). Sorel, Bull. Soc. I n d . Mulhouse, 59, 240 (1889); J . SOC.Chem. I n d . , 9, 175 (1890); 2. angew. Chem., 2 , 272 (1889). Tammann, 2. physik. Chem., 2, 42 (189s); Memo. acud. Petersbourg, [71 36 (1887). Wilson, J , Ind Eng. Chem., 13, 326 (1921). Porter, Trans. Faraday Soc., 13, 373 (1918).
Swedish Tariff Revision-"Artificial tanning materials, not specially mentioned, wholly or partly organic," have been embodied in an item in the Swedish tariff, and will be free of duty by an Act of March 8, 1925, effective on a date to be determined by the King.
