620
INDUSTRIAL AND ENGINEERING CHEMISTRY
state was assumed when the vapor thermometer remained a t a given point for a time, during which condensate flow was an additional amount of two or three times the volume of the reservoir. Heating was then stopped, and the iiquid sample was taken as follows: After a small amount of the liquid was run to waste to wash out the line, a test tube surrounded by an ice-water mixture was held up and around a two-hole stopper fixed on the drain outlet, as liquid sample was drawn; the test tube was promptly stoppered. The condensate sample cock was purged, and a sample of the condensate was drawn immediately into another chilled test tube which was also promptly stoppered. Tables I, 11, and 111 and Figures 4,5, and 6 give the data. The graphs shorn the experimental points. For ease in using the data, these points and the best curves through them were carefully plotted on a large scale; values for the vapor compositions are tanulated for even mole per cent compositions of the liquid, Unless otherwise noted, the pressure was within a few millimeters of the normal barometer and was substantially constant throughout the time necessary to obtain the samples.
Vol. 35, No. 5
Philip E. Tobias, and Edward Trueger. Thanks are also due Robert Benenati, F. Robert Morley, and Robert Goldberg for organizing the data and drafting the figures, and in particular to T. H. Chilton and H. C. Carlson of E. I. du Pont de Nemours & Company, Inc., for their critical review of the data. The apparatus shown was supplied by the Emil Greiner Company of New York. LITERATURE CITED
(1) Brunjes, A. S., and Furnas, C. C., IND. ENG.CHEW.,28, 573 (1936). (2) Carveth. H. R., J. Phys. Chem., 3,193 (1899). (3) Daniel, Matthews, and Williams, “Expezimental Physical Chemistry”, p. 301, New York, McGraw-Hill Book Co., 1929. (4) Langdon, W. M,, and Keyes, D. B.,IND. ENG.CHEX.,34, 938 (1942). Othmer, D. F., Ibid., 20, 743 (1928). Ibid., 32, 841 (1940). Othmer, D. F., IND. ENG.CHEM.,ANAL.ED., 1, 97 (1929). Ibid., 4 , 232 (1932).
Othmer, D. F., and White, R. E., Trans. Am. I n s t . Chem. Engrs., 37, 135 (1941).
Sameshima, J., J. Am. Chem. SOC.,40, 1482 (1918). Trimble, H. M., and Potts, W., IND.ENO.CHEX.,27, 66 (1935.)
ACKNOWLEDGMENT
The data were obtained by a succession of students in the Department of Chemical Engineering whose work is gratefully acknowledged, especially Jin L. lSuey. Robert E. Yhite,
PRESENTED before the Division of Industrial and Engineering Chemistry a t the 104th Meeting of the A ~ s n 1 c . CHEMICAL 4~ SOCIETY, Buffalo, N. Y.
I
NUREMBERG PHARMACY
By P. Decker
e No. 149 in the Berolzheimer series of Alchemical and Historical Reproductions presents the historically famous Nuremberg pharmacy in Bavaria as it appeared in 1700. This is copied from a n engraving after a n original by P. Decker. The operations carried out must have been largely grinding and triturating, as evidenced by the four mortars and the rubbing plate. Weighing, at least oflarge quantities, was evidently not done much, for the scale shown in the center of the room is rather small. Graduates, other measuring utensils, and glassware seem to be absent, except for the bottles containing drug supplies. This was strictly a pharmacy: there are no soda fountain, sandwiches, toys, books, or other merchandise as sold by our modern, misnamed drugstore. D. D. BEROLZHEIMER 50 East 41st Street Xew Yorlr, N. Y.
The lists of reproductions ana directions for obtaining copies appear as follows: 1 to 96, January, 1939, page 124: 97 t o 120. January 1941, page 124; 121 t o 144, January, 1943, page 106. A u additionai reproduction appears each month.
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