From CONSTABLE'S LIST 

 Staple Trades and Industries. 



Edited by Gordon D. Knox. 



Bemy 8vo. Ilhtstrated. 6j. dd. net each. 



A NEW series of books designed to convey a full knowledge of the raw 

 -^^ materials and manufactured produces that are of such vast importance 

 to the life of the country. Each volume is the work of an expert who will 

 present facts and figures in a readable form, enabling those who have not 

 an expert training in the industries to realise the essentials concerning 

 them, and to form a sound judgment regarding the commercial oppor- 

 tunities that will occur to further the national and imperial life of the nation 

 by developing them to their utmost. 



First Volumes, now ready. 



WOOL. COTTON. 



By Frank Ormerod. By George Bigwood. 



These ■will be followed by volumes on TEA, LINEN, and the 

 NITROGEN INDUSTRY. 



PURCHASING: Its Economic Aspects and Proper 

 Methods. 



By H. B. Twyford, of the Otis Elevator Company. 



112 Charts, Diagrams and Forms. Large Demy %vo, 2^2 pp. i^s. net. 



The subject is treated as only an experienced buyer could treat it, and it deals with 

 purchases in practically all lines of business. The author quotes an experienced business 

 man as saying that "successful foundation for new enterprises, the growth of established 

 undertakings, and their accretion to their resources is in a large measure dependent on 

 the importance attached to, and the careful thought given to, the expenditure of all money 

 for capital purposes, production, and supplies." To set forth at least the general 

 principles of this successful purchasing is the task which the author has set himself. 



APPLICATIONS OF PHYSICO-CHEMICAL 

 THEORY TO TECHNICAL PROCESSES AND 

 MANUFACTURING METHODS. 

 By Dr. R. Kremann. Translated into English and 

 edited by H. E. Potts, M.Sc. 



Demy 8vo. gi. net. 



Contents. — The Two Fundamental Laws of the Mechanical Theory of Heat. 

 Reaction- Velocity and Cataly tes. Other Special Applications of the Law of Mass Action. 

 The Influence of Temperature on the Equilibrium-Constant. Dissociation Pressure. 

 Application of the Phase Rule. The Application of the Phase Rule to Solid-Liquid 

 Systems. Transformation Phenomena in Hydraulic Binding Agents. Other Applica- 

 tions of the Phase Rule. The Distribution Law. Adsorption Compounds. Reciprocal 

 Pairs of Salts. 



CONSTABLE U CO., LTD., 10-12 Orange S/., Leicester Sj., London, fF.C. 2 



