reader immediately recognizes that he has been plunged into surging torrents of ~eientificprogress. A volume such as this contains much material, principally of a mathematical nature, uncomfortably recondite for the average chemist, even to the physical chemist. Nevertheless, he grasps a feeling of the extent of the basic studies in pl.ogress and is occasionally charmed by bits of usage that seem to verge almost on chemistry, e.g., the fact that a r + meson plus a single electron which it picks up during the dowingdown process can be treated xs a "muonium system." The flavor of the phy~iealand of the hiological portions of this volume is here only lightly rendered. I t should be emphasized that each chapter is reasonably extensive and inherently engrossing even to the neophyte. In the chapter, Biachemical Effects of Ionizing Radiations, the comments on the role, or lack of role, of HO1 and on radiation protection in hibernating animals are particularly evocative to thin reviewer. In the chapter, Vertebrate Radiobiology, he finds the section on dosimetry equally engrossing. Two other chapters are particularly useful for chemists. The one on Radiochemical Separations by Ion Exchange treats ion exchange processes very broadly. I t ia intended to be, and is, useful also t o chemists interested in separations of nonradioactive material. I t concludes with
VOLUME 35. NO. 7, KlLY, 1958
a comment on the applicability of ion exchange in systematic analysis. The chapter, Equipment for High Level RadiaChemical Processes, can he read sdvsntageously by every chemist active in any branch of radiochemistry as well as by
POLYURETHANES Bernard A. Dombmw, Director of Laboratories, Plastics Division, Nopco Chemical Co., North Arlington, New Jersey, 176 pp. 13.5 X 19 cm. 1958. ix $4.50.
+
POLYAMIDE RESINS MILTON BURTON U m v s n a r n or NOTREDAME N o m e DAXE.INDIANA
Dooold E. Floyd, Chemical Applications Sedion, General Mills, Inc., Minneapolis. Reinhdd Publishing Corp., New York, 230 pp. 13.5 X 19 cm. 1958. viii $4.50.
+
PLASTIC SHEET FORMING SIXTH SYMPOSIUM (INTERNATIONAL) ON COMBUSTION The Combustion Institute. Reinhold Publishing Corp., New York, 1957. xxv 943 pp. Many figs. and tables. 18 X 26 cm. $28.00.
+
THE Sixth Symposium on Combustion was held during the summer of 1956. This volume collects the 129 papers read by authorities from all over the world and a180 provides r6aum6s of three panel discussions. One-third of the book is devoted t o the structure and propagation of laminar and turbulent flames. No library promising a coverage of newer developments in the study of reaction kinetics, thermodynamics, or experimental and andytieal techniquee can be without this 943-page record of combustion research and its application.
Robert L. Butzko. Auto-Vac Co.. Bridoeport, ~ o n n e c t i c u i Reinhold ~"blishi& 181 pp. Corp.. New York, 1958. viii 13.5 X 19 om. $4.50.
+
THESEthree further volumes of the Reinhold Plastic Application series pravide interesting and useful introductions to their respective fields. The series is written on s semi-technical level 80 that it e m be read easily by the chemistry student or practicing chemist who lacks background in the field of high polymers. The books on polyurethanes and polyamides contain chapters on the chemistry of these substances as well as more extensive material on their technalogical applications. The third valum~, "Plastic Sheet Forming," is confined to purely engineering considerations. THOMAS FERINGTON COLLEUE OF WDDSTER
W o o s r ~ n Onio .
