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Reviews of Late Books The Use of Derrick Cranes, Safety Pamphlet No. 15; issued by the home office; printed and published by His Majesty’s Stationery Office; paper; 27 pages; 9% x 6 inches; supplied by The British Library of Informa- tion, 270 Madison Ave., New York, or by MARINE ReEviIEW and in Europe by the Penton Publishing Co. Ltd., Caxton House, London. This pamphlet is the result of an investigation of crane accidents over a number of years. Many accidents might have been prevented by the observance of reasonable precaution. Among the more usual causes of crane accidents and crane failures have been improper use, careless handling, or failure on the part of users to carry out necessary main- tenance work, Such comparatively common occurrences as fractures of parts, failure of ropes or chain or failure of anchoring appliances could be avoided in most cases by periodic thorough examination with replace- ment of defective parts and by prop- er use. The pamphlet calls attention to the fact that such examinations and some of the other steps recommend- ed are required by law at docks, shipbuilding yards, and buildings in the course of construction. The interest of this pamphlet to the American shipowner and _ ship- builder, and others not subject to the regulations of the British govern- ment, lies in the value of the sug- gestions made which will apply with equal force wherever such equipment is used. Various features are discussed with reference to precautions that should be taken in the purchase of new and second hand cranes; in the erection of a crane; in tests after erection; in the question of stability, anchorage, overloading, etc. Many types of cranes and equipment are described and illustrated. Attention is given to such matters as corrosion of metal parts, faulty lubrication, ropes, rope attachments, drums, pul- leys, etc.; brakes and controls and also to the operating mechanism. Industrial-Radiography, by Ancel St. John and Herbert R. Isenburger; 232 pages; 9 x 6 inches; with numerous illustrations; published by John Wiley & Sons Inc., New York; supplied by Marine Review for $3.50, plus 15 cents postage; and in Europe by the Pen- ton Publishing Co. Ltd., Caxton House, London. This book, prepared by authorities on the subject, presents the practical aspects of industrial radiography in the form and language which can be understood by those who desire a thor- 38 ough understanding of the basic the- ories involved. It deals in an authoritative manner with the practical applications of X- ray and radium inspection. No at- tempt has been made to produce a Sci- entific treatise or a comprehensive work of all the theories . The theoreti- cal part has been treated briefly, yet thoroughly enough to cover all that is needed for a study of the art and for successful operation. In preparing this book, the authors have had in mind its practical useful- ness for engineers, metallurgists, sales- men, and executives who have to do with developing, working, purchasing and Selling materials. It will also be helpful to instructors, students and Op- erators. Engineers and others will have their attention directed to the value of this comparatively new technique in activi- ties where hitherto its use has not been fully realized. There are 20 chapters, the headings of some of them will indicate the field covered. The infancy of radiography is dealt with in chapter 2. Other sub- jects covered are the present status of industrial radiography; nature and properties of x-rays; production of x-rays; detecting and recording x-rays; an installation for industrial raiog- raphy; photographic procedure; inter- preting radiographs; radiography of welded vessels and structures; some interesting examples; and operating and cost data. Many illustrations are given which aid greatly in interpreting and clarify- ing the text matter. There are three appendices of tables, charts, and biblio- graphy on radiography. With the steadily increasing demand for certainty as to the quality of work- manship and material in shipbuilding and ship repairing, this book will be found of special value in all shipyards and ship repair plants. It is in every sense of the word a practical treatise and gives a great deal of information developed during long experience in this work. Procedure Handbook of Arc Welding Design and Practice; a revised and en- larged edition, published by The Lin- coln Electric Co., Cleveland; over 450 pages; 9 x 5% inches; several hundred illustrations; supplied by Marriner Rr- view for $1.50 plus 15 cents postage; and in Europe by the Penton publish- ing Co. Ltd., Caxton House, London. Because of the demand, which ex- hausted the original issue published last year, this book has been reissued. The eight principal sections deal with various phases of are welding in MARINE REVIEwW—July, 1934 a simple, concise manner, well illus- trated with detailed drawings and photographs. Practically every use and application of arc welding is described. Among the many additional fea- tures in the new edition are the fol- lowing: weld inspection (visual, stethoscopic, electro-magnetic, x-ray and gamma ray) ; study of stress dis- tribution by means of polarized light; a simplified method for the design of are welding machinery; procedure and speed for are welding aluminum ; technique and speeds for welding copper; and construction of welded water lines. A portion of this book is devoted specifically to the use of are welding in shipbuilding and ship. repairing. VDI Forschungsheft 363, Langen- Lindner, paper, 22 pages, 11% x 8% inches, published by VDI-Verlag G.m.b. H., Berlin, Germany, and supplied by Marine Review, Cleveland, and in Lon- don, by the Penton Publishing Co. Ltd., 416-17 Caxton House, Westmin- ster. ae This bulletin which is in German and published by the Verein deutscher Ingenieure as a supplement to Re- search in the Field of Engineering Technique contains two articles relat- ing to research on diesel engines. The first by Dr. Arnold Langen is entitled “The Diesel Locomotive with Direct Drive,” and the second by Dr. W. Lind- ner is entitled ‘‘Researches on the Scavenging Process in Two-cycle Ma- chines.” The first article describes in- vestigations undertaken by Dr. Langen which eventually led to the construc- tion of a direct drive diesel locomo- tive. The second article on ”Researches on Scavenging in Two-cycle Machines” is divided into three parts. The first part describes investigations with a cylinder model and discusses research arrangements; stream flow with ordi- nary and high scavenging, and dis- charge point; and influence of the shape of the inlet canal or opening. Part B describes researches on a mod- el cylinder including measurements with a stationary piston and a moving piston, giving data on stream flow and discharge point, effective orifice cross section (nozzle value), effective time- area and flow figure, and relation of the discharge point. That section also discusses measurement on an igni- tion machine with information on the influence of the back pressure exhaust in the inlet opening upon the flow fig- ure, and scavenging efficiency and its connection with the operation of the machine. The third section deseribes measurement of the scavenging effi- ciency. The Acheson Colloids Corp., former- ly the Acheson Oildag Co., Port Huron, Mich has made available for distribu- tion its technical bulletin No. M92, dealing with colloidal gsraphited lubri- cants.