find ready acceptance. I t is printed by an offset process from a typewritten manuscript, and yet is clearly and attractively reproduced. Since no space is provided therein for analytiesl data or student answers, as is common t o most loose-leaf manuals, i t is suggested that a smaller and more durable hinding might enhance the permanent value of the hook. The paperspiral hinding could logically he replaced with traditional stiff, cloth covers. However, this appears to be a limited first printing, and perhaps of a trial nature. The illustrations a;re detailed, clear, and well drawn. Directions are logical, sound, and adequate. Some analytical proce dures are omitted but the tluthors make no elaim for completeness. The material included offers a wide variety of experiences and procedures. The work included is more than adequate for a quarter or semester course, including one hour of discussion and four to six hours of laboratory work per week. The text can he highly recommended for a course that normally follows a traditional course i n organio qualitative analysis. The material is appropriate for undergraduate seniors and first-year graduate students who are meking a. working scheme and broad familiarity with organic quantitative analytical principles and procedures. Many busy instructors will appreciate the logical, complete, and detailed instructions that should reduce their supervision to s. minimum. RALPH E. DUNBAR N o n r ~D ~ O TSTATE A COLLEDE F ~ n c o Nomm . DAKOTA
GMELINS HANDBUCH DER ANORGANISCHEN CHEMIE. SYSTEM 28: CALCIUM Teil B, Lieferung 1: Techndogie. Eighth edition. Edited by the Gmelin Institute under the diredion of E. H. E. Pietsch. Verlag Chemie, GmbH, Weinheim Bergstrasse, Germany, 1956. viii 264 pp. 28 figs. 17.5 X 25.5 em. In wrappers, $37.
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PART B, Section 1 of the volumes on calcium is concerned entirely with the technological aspects of the chemistry of t h s element and its compounds. As such, it is a treatment of one of the more important, although somewhat less glamorous, areas of modern chemical industry. I n its preparation, every attempt has heen made to provide the details of technical practice. This has been accomplished by means of unususlly comprehensive literature citations, of critical evaluation of published data, and of liberal use of graphs and diagrams of industrial equipment. Emphasis upon recent publication and upon timely accounts of technology is particularly evident. The introductory chapter deals with the beneficiation, recovery, and treatment of calcium minerals. T b i ia ~ followed by short sections on metallic calcium and calcium hydride. The lime industry is then treated extensively, and this is followed by sections dealing with essentially all known calcium compounds. The arrangement is in the main by periodic
group in which the element forming the anion is located. Discussions dealing with halides, hypochlorite, sulfates, carbide, carbonates, cyanamide, and phosphates are particuldy extensive. Msny applications rare listed for all materials. This volume illustrates admirably the care, meticulous effort, and fine degree of organization which characterize the entire Gmelin series. I t is a volume which will t w \rrlromrrl t.y nnyonr intrrwlrtl in an). ph:,.
