Special mention should he made of the unusually attractive and artistic pictures which the author has used to adorn his
t o mark the groups of compounds will facilitate the use of the table. The metal-organic compounds have been segregated a t the end of the main tahle. "The section devoted to the description of the elements has also been wholly rewritten, made more complete and brought up-to-date. The revision of the tables giving the characteristics of thermionic vacuum tubes has been made necessary by the appearance of a very large number of new types. A new tahle which will he of interest t o a wide circle of readers is the unusually complete compilation of the speed of photographic plates and films. The elastic and mechanical properties of materials replaces a former tab16 on the same subject. Through the courtesy of the leading manufacturers, the table 'Transmission of Colored Glassses' has been brought up-to-date. The mathematical section has been increased by the addition of the tahle 'Factors and Primes.' Other important additions or revisions are as follows:
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B r i d y , "Chemical Economics?.is a book of interest t o young and old, t o the student, teacher, industrialist, and, in fact, t o every one who is interested in chemistry. D. B. KEYES U ~ m s r rO r .. ILLIli018
uaaur*,
ORGANISCHEFARBSTOPPE,ANLEITUNG ZVM SCHRITIWEISEN ElNnRrNoEN I N DIE FARBENCEEUUE AUP KOORDINATIONS TaEonEnscnEn GRIINDLAGE. Dr. R. Wizinger. Privatdozent an der Universittit Bonn. Ferd. Diimmlers Verlag, Berlin 86 LXVII. 22.5 X 28.5 cm. and Bonn, 1933. x Paper-hound, M. 9.80; Cloth-hound, M. 11.80.
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"In addition, many corrections and minor changes have been made."
Beginning with an interesting general disfussiou of color, a good background is given for the presentation of the later chapters. The historical development of the theories of color and constitution from 0. N. Witt t o W. Dilthey and R. Wizinger is given briefly, after which the various groups of dyestufis are discussed in detail. This is followed by a theoretical consideration of the process of dyeing different materials. In closing, one hundred fifty of the more important dyestufis have been classified according t o the Dilthey-Wizinger theory following the method of presentation of Schultz or the Color Index. The author has, of course, presented in an exceedingly able manner the theories put forth a t Bonn by Dilthey and Wizinger regarding the organic dyestufIs. Also, in a few sentences the main points in this field &ve been mentioned in historical sequence. For those who care for more detailed information than can be given in a short monograph, abundant references t o larger works and the original literature are given. The book should be of great assistance t o the student studying the organic dyestuffsfor the first time and a valuable addition t o the library of the chemist. ' RALPHT . K. CORNWELL
Williomr Haynes, Publisher of "Chemhl CHEMICAL ECONOMICS. Induslries"and "Piastic Products." D. Van Nostrand Company, Inc., 250 Fourth Avenue, New York City, 1933. xviii 310 pp. 93 Figs. 14 X 22 cm. $3.25.
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The purpose of the book is t o present briefly and concisely the main ideas pertinent t o a systematic study of organic dyestuffs with emphasis on the work done a t the University of Bonn. I t might be well to list the headings of the different parts into which the subject matter is divided. ColorSensory Impression pp. 1-2 Color-a Physical Phenomenon 3-9 Constitution and Color 1&63 The Process of Dyeing 6P86 I-LXVII Table of Dyestuffs
p H values for potentiometer readings Mass absorption for X and y rays Organic analytical reagents Volumetric primary standards Solubility chart Musical scales Liquids for index of refraction by immersion method Density of fluosilicic acid solutions.
The fundamentals of chemical economics is a fascinating subject and one which has received very little attention. Mr. Haynes has not only carefully summarized these fundamentals. hut he has put them in a form which is quite palatable to the average reader. There are two sections t o the book. The first involves the economic foundation of the chemical industry, and the second, the historical background of the chemical industry. The former covers such material as the economics of chemical production, supply and demand, cost, value, price, and distribution. The latter gives an outline of industrial evolution and describes the development of the chemical industry not only in the United States, but also in foreign countries. Cartels, consolidations, and mergers are specifically treated. The final chapter deals with the chemical future. The fundamentals of chemical economics has been treated in meat detail with a myriad of il1ustr;itions. For example, the author points out quite clearly why i t is that the industrial concern which develops a new productthat can be put to new uses is bound t o he successful even in depression periods. He writes a t length concerning the evils of over-production of the commodity whose use is well known but limited. Evidently from an economic standpoint, one of the mast important reasons for research and development is the creation of new things with new uses, rather than the modification of existing processes to decrease the cost of production. Such points as these cannot be overemphasized and i t is t o the author's credit that they are not .... onlv , riven ..~ an imoortant ~0sitionin his text. but they are treated in il manner so that rhr average readcr will not only undcrstand and appreciate thrm, hut will actually derive pleasure from reading the same. The second section of the book is most fascinating. I t is the first time that a short history has been made of the development of chemical plants throughout the world. Even t o those who are somewhat familiar with this development, i t is still interesting and most entertaining.
ILLMOIS
COBP., FaaosalcKsauao, VmomrA
SXXVrWIA INOOSTRZAL
MISCELLANEOUS PUBLICATIONS .
DEFINITIVEREPORTOP TAB C O ~ I S S I O ON N THE REFORMOP THE NOMENCLATURE OP ORGANIC CHEMISTRY.Translation with comments. Austin M. Patterson. Reprint from the 3. Am. Chem. Soc., 55, 3905-25 (1933). A copy of this reprint will be sent free t o each member of the Organic Division of the A. C. S., and a limited number of additional copies are available for ten cents each through the secretary, Arthur J. Hill, Sterling Chemistry Laboratory. Yale University, New Haven, Conn. (NEW SERIESOF MICROSCOPES FOR STUDENT AND RBSEARCA WORK.) Bausch & Lomb Optical Co. 15.7 X 23.7 cm. Eigbt-page folder with photographs, descriptions, and price list of the new HS series of microscopes.
