June, 1930
I X D U S T R I I L Ah-D ENGIXEERIXG CHEMISTRY
discussion of such a fundamental process as cracking is limited to a skimpy paragraph of less than two hundred words. On the other hand, packed into the three volumes are other monographs that bear the unquestioned stamp of authority, particularly those dealing with the key industries of Germany, such as nitrogen and potash. The work as a whole is especially valuable to the reference library for its many journal and patent citations.-H. I,. OLIX
687
tions are in all cases made on the pages where the subject is discussed and a complete index comprising some 400 subjects enables one to locate a given subject quickly. A complete author index is also given whereby one can quickly find reference to all the recent work of any given author in the field. This feature is indeed a time-saver and will be appreciated by the research man and the busy technologist as well.-JOSEPH D . DAVIS
Analyse der Harze, Balsame und Gummiharze. BY KARL Die neuzeitliche Speisewasser-Aufbereitung. BY HAXSBALCKE. 138 pages. 98 figures. Verlag von Otto Spamer, Leipzig, DIETERICH. 2nd edition, revised and enlarged by ERICH 1930. Price, bound, 16 marks; paper, 14 marks. STOCK. x 4- 456 pages. Julius Springer, Berlin, 1930. Price, 44 marks. This book presents a fairly complete, if somewhat elementary, The first edition of this well-known treatise appeared in 1930. picture of contemporary developments in the treatment of feed Within its 286 pages fifty-two balsams and resins were discussed. water, intended, as explained by the writer in his preface, as a I n the present edition the original method of treatment has been source of information for the men in charge of both small and maintained. The general part contains a discussion of the forma- large boiler installations. It depends less upon the literature than tion and properties of resins and the qualitative and quantitative upon the experience of the writer. This experience may be exmethods suitable for their examination. Rightly, caution is cellent from the technical end, but its chemistry is apparently urged in the use of color reactions. I n the special part are given that of the mechanical engineer, with all due respect to this the chemical composition, general properties, constants, methods profession. Thus the myth is perpetuated that magnesium chloof analysis, etc., of seventy-nine balsams and resins. For the ride in a boiler water hydrolyzes, liberating hydrochloric acid. The book is divided into five parts, devoted, respectively, to separation of resin and fatty acids the Wolff-Scholze esterification method is recommended as simpler and more c:onvenient discussions of the necessity for boiler feed-water treatment; of than the classical Twitchell method. The information on rosin, modern German systems for the treatment of feed for power the only important resin produced in the United States, is up to boilers; and of systems of treatment for heating boilers and hot-water installations; for ships; and for locomotives. Of the date. The revision renders the book the most useful in its field.98 illustrations, 51 are cross-section drawings of equipment A. W. SCHORGER or diagrams of equipment layout. There are also some interesting photomicrographs of the structure of boiler scales. Katalytische Reaktionen in der organisch-chemischen Industrie. The discussion of boiler feed-water treatment is divided into I Teil. BY HORSTBRUCKNER.Band XXII of Technischen four parts, devoted, respectively, to straight chemical systems, Fortschrittsberichte, edited by R. RASSOW. 168 pages. thermochemical systems, evaporators, and de-aerators. Under Verlag von Theodor Steinkopff, Dresden and Leipzig, 1930. the heading of chemical systems only the lime-soda and the zeolite softening methods are described. Considerable attention Price, paper, 14.50 marks; bound, 16 marks. is given to the matter of corrosion prevention. The text throughI n this book is assembled a large amount of information which out is of a general descriptive nature. The book offers a fair is taken principally from patent literature. After a brief dis- summary of German technology in feed-water treatment, but the cussion of catalysis, descriptions are given of the methods used reader should not expect to use i t as a source of fundamental inin the preparation of the various agents employed and of the formation. purification of the gases used in large-scale catalytic operations. About 100 pages are devoted to a consideration of the industrial L’Alluminio. I metalli leggeri e le lor0 leghe. BY E. KOELpreparation of organic compounds by means of oxidation, hydraLIKER AND U. XAGNANI. xxiv 468 pages. 37 illustrations tion, and dehydration. I n addition to excellent author and suband 15 tables. Ulrico Hoepli, Milan, 1930. Price, 34 lire. ject indexes, lists of the patents cited are given in tabulations arranged according to countries and numbers and with referThis handbook is a concise and quite complete story of the ences to the pages on which the patents are discussed. aluminum industry. The book is divided into seven parts. The As many of the compounds considered are now being actively first part gives a history of aluminum, its occurrence, and its investigated, the book will prove of value, to those busy in this chemical and physical properties. The preparation and properfield, as a digest of previous work. ties of its more important compounds are described. The next The descriptions of procedures used in the preparation of the two parts describe the preparation of the metal, including the large number of compounds considered is as full as could be ex- preliminary processes for handling and treating the various ores pected, since the information available is necessarily limited to used as the raw material. The electrolytic process is described published work and to patent literature. in great detail. A chart shows the plans of a complete plant. Many facts are presented which are of interest to those who There are also several diagrams of equipment as used in several follow the development of organic chemistry. The teacher will different countries, the European practice naturally being given find ample material which will be helpful in vitalizing his instruc- in most detail. tion. From a broad point of view the book shows how industry Part IV describes the preparation, properties, and uses of the is utilizing the results of pure and applied research.---JAMES F. various alloys containing aluminum. Methods used in the prepaNORRIS ration of aluminum tools, utensils, etc., are briefly described. Aluminum soldering, plating, aluminothermy, and the various Kokereiwesen. Technische Fortschrittsberichte. Fortschritte uses of aluminum are indicated. Part V discusses the use of der chem. Technologie in Einzeldarstellungen. Band 21. BY aluminum in chemistry (organic and inorganic), in electricity, transportation (airplane, automobiles, etc.), as well as numerous H. HOCK.172 pages. Theodor Steinkopff, Dresden and miscellaneous applications. Part VI is a very brief discussion Leipzig, 1930. Price, bound, 15.50 marks. of the preparation and properties of the light metals other than aluminum. Part VI1 is a study of the economics of aluminum, This report deals with progress made in coking technology cost of manufacture, of electric power, plant design, as well as and in scientific investigation of the coking process during the the future possibilities. past ten years. The subject proper is treated under four main The book is well written on good paper and is very interesting headings: (1) coking coals-their origin, preparation, and selec- reading-not a mere catalog of facts. A study of such a specialtion; (2) the coking process-mechanism of coke formation and ized subject might profitably have included a more extended improvements in coking practice; (3) coke-its properties, bibliography, although a fair number of references are given. evaluation, and utilization; (4) raw gas-purification and utiliza- The book will appeal to any person interested in aluminum or tion. Under this topic disposal of coke-oven wastes and re- its products whether from a chemical or industrial standpoint.forming of gas are treated somewhat a t length. A, W. COVTIERI The various phases of the subject are for the most part discussed very briefly but with copious references to recent literature. The author is rather sparing in critical comment and Correction does not give a general summary setting forth the status of the a r t as one might expect. The reader is left to form his own Modem Methods of Cocoa and Chocolate Manufacture, by H. W. estimate of just what progress has been made in the field. BYWATERS.I n the review published in the April, 1930, issue The manner of treating the comprehensive bibliography in the price was incorrectly quoted. The correct price in $6.00. this report is to be commended most highly Literature cita-
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