Total fatty and resin acids, Determination of in soap, 144. Train oils, 20. Transparent soap, 82. Transparent soap, Cold made, 84. Troweling soap, 52. Tsujimoto, ref., 20. Tubes for transparent soap, 85. Turkey red oil, 104. Twaddle scale, 25. Twitchell method for rosin, 145. Twitchell process, 113. Twitchell process, Advantages, 113. U Unsaponifiable matter, Determination of in oils and fats, 132. Unsaponifiable matter, Determination of in soap, 148. Unsaponifiable matter, determination of by standard method, 176. V Vacuum Oven, Standard, 176. Vegetable oils, 6. W Water, 29. Water, Hard, 29. Witch hazel soap, 78. Wool thrower's soap, 100. Worsted finishing soaps, 101. Z Zinc oxide, Use of in autoclave saponification, 120. Zinc oxide, Use of in soap, 33. LITERATURE OF THE CHEMICAL INDUSTRIES On our shelves is the most complete stock of technical, industrial, engineering and scientific books in the United States. The technical literature of every trade is well represented, as is also the literature relating to the various sciences, both the books useful for reference as well as those fitted for students' use as textbooks. A large number of these we publish and for an ever increasing number we are the sole agents. ALL INQUIRIES MADE OF US ARE CHEERFULLY AND CAREFULLY ANSWERED AND COMPLETE CATALOGS AS WELL AS SPECIAL LISTS SENT FREE ON REQUEST D. VAN NOSTRAND COMPANY _Publishers and Booksellers_ 8 WARREN STREET NEW YORK The Soap-Maker's Book Shelf A list of standard books relating to soapmaking and allied industries. Published and For Sale by D. VAN NOSTRAND COMPANY _Publishers and Booksellers_ 8 WARREN STREET NEW YORK ~Askinson, George W.~ Perfumes and Cosmetics. Their preparation and manufacture. Fourth Edition, translated from the German, and revised with additions by W. L. Dudley. 32 illustrations. 6-1/4 x 9-1/2. Cloth. 354 pp. New York, 1915. ~$5.00~ ~Chalmers, T. W.~ The Production and Treatment of Vegetable Oils. Including chapters on the refining of oils, the hydrogenation of oils, the generation of hydrogen, soap making, the recovery and refining of glycerine, and the splitting of oils. 95 illustrations, 9 folding plates. 8 x 11-1/2. Cloth. 163 pp. London, 1919. ~$7.50~ ~Deite, C.~ Manual of Toilet Soap-Making. Comprising toilet soaps, medicated soaps, and other specialties. Second Revised Edition. 85 illustrations. 6-1/2 x 10. Cloth. 356 pp. London, 1920. ~$7.50~ ~Ellis, Carleton G.~ The Hydrogenation of Oils, Catalyzers and Catalysis and the Generation of Hydrogen and Oxygen. Second Edition, thoroughly revised and enlarged. 240 illustrations. 6-1/4 x 9-1/2. Cloth. 767 pp. N. Y., 1919. ~$7.50~ ~Fischer, M. H.~ Soaps and Proteins, Their Colloid Chemistry in Theory and Practice. With the collaboration of G. D. McLaughlin and M. O. Hooker. 114 illustrations. 6 x 9-1/4. Cloth. 281 pp. New York, 1921. ~$4.00~