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INDUSTRIAL AND ENGINEERING CHEMISTRY
If the preparation is to be a large-scale process, some provision should be made for returning vaporized hydrogen fluoride to the electrolyte and for adding more hydrogen fluoride as the cell operates. One may conclude that the preparation of fluorine is not extremely difficult, but that there appear to be a number of possibilities for improvements in the process. Bibliography (1) Argo, W. L., Mathers, F. C., Humiston, B., and Anderson, C. O., Trans. Electrochem. SOC.,35,335 (1919). (2) Cady, G. H., in Booth’s “Inorganic Syntheses”, Vol. I, p. 142, New York, McGraw-Hill Book Co., 1939. (3) Cady, G. H., J . Am. Chem. SOC.,56, 1431 (1934). (4) Calcott, W. S., and Benning, A. F., U. S. Patent 2,034,458 (March 17, 1936). (5) Denbeigh, K. G., and Whitlaw-Gray, E., J . SOC.Chem. Ind., 53, 139 (1934). (6) Dennis, L. M., Veeder, J. M., and Rochow, E. G., J . Am. Chem. SOC., 53, 3263 (1931). (7) Fredenhagen, K., and Krefft, 0. T., 2. Elektrochem., 35, 670 (1929). (8) Freres, P., and Meslans, M., German Patent 129,825 (1900).
Vol. 34, No. 4
(9) Gmelin’s Handbuch der anorg. Chem., 8th ed., No. 5, Fluorine, pp. 13-18 (1927). (10) Henne, A. L., J . Am. Chem. SOC.,60, 96 (1938). (11) Jones, N. C., J . P h y s . Chem., 33,801 (1929). (12) Latimer, W. M., and Hildebrand, J. H., “Reference Book of Inorganic Chemistry”, p. 159, New York, Macmillan Co., 1940. (13) Lebeau and Damiens, Compt. rend., 181,917 (1925). (14) Mathers, F. C.,and Stroup, P. T., Trans. Electrochem. SOC.,66, 245 (1934). (15) Meyer, F., and Sandow, W., Ber., 54, 759 (1921). (16) Miller, W. T., and Bigelow, L. A., J . Am. Chem. SOC., 58, 1585 (19361. (17) M&san, H., Ann. chim. phys., [6] 12,508 (1887). (18) Moissan, H., Compt. rend., 128, 1543 (1899). (19) Ruff, O., “Die Chemie des Fluors”, p. 64, Berlin, Julius Springer, 1920. (20) Ruff, O., and Bretschneider, O., 2.anorg. allgem. Chem., 217, 1 (1934). (21) Schumb, W. C., and Gamble, E. L., J . Am. Chem. SOC.,52, 4302 (1930). (22) Simons, J. H., in Booth’s “Inorganic Syntheses”, Vol. I, p. 138, New York, McGraw-Hill Book Go., 1939. (23) Simons, J. H., J. Am. Chem. Soc., 46, 2175 (1924). (24) Whearty, 5.F., J . P h y s . Chem., 35,3137 (1931).
PRESENTED before t h e Division of Physical and Inorganic Chemistry a t t h e 100th Meeting of the AMERICAN CHEMICAL SOCIETY,Detroit, Mich.
DISTILLATION A r t i s t Unknown
THIS
Berolzheimer Alchemical and Historical Reproduction (No. 136 in the series) is from a wood-cut on the title page of Michel Puff von Schrick’s very rare book on “burned waters”, published in Augsburg, Germany, in 1508 by H. Froschauer. The full title of the book is “Von den ausgeprannten wassern in welcher mass man die nutzen unnd prauchen sol1 zu gesuntheyt der menschen”-On burned waters (brandies) and in what quantity they should be utilized and used for the health of mankind. The book describes the making of distilled extracts and tinctures from about seventy different herbs and fruits. The oven and still are obviously outdoors. Note the herb growing a t the distiller’s feet, beside the fuel.
D. D. BEROLZHEIMER 50 East 41st Street New York, N. Y.
The lists of reproductions and directions for obtaining copies appear aa follows: 1 to 96, January, 1939. page 124. 97 to 120 January 1931 page 114. 121 to 132, January, 1942, page 119. i n additiond reprodudtion ippears each month.
