NOW READY 



Report of the General Discussion on 



PHYSICO-CHEMICAL PROBLEMS RELATING TO THE SOIL 



held by the Faraday Society in London. May 1921 

 (containing additional matter not presented at the meeting) 



Price 10/6 net in limp cloth, 156 pages 



Orders should be sent to 

 THE FARADAY SOCIETY, 10, Essex Street, London, W.C. 2 



BASIC SLAGS AND ROCK PHOSPHATES 



By GEORGE SCOTT ROBERTSON, D.Sc. (Dunelm), F.I.C, 



With a Preface by 



EDWARD J. RUSSELL, D.Sc. (Lond.), F.R.S. 



With 8 Plates and a Map. Small Royal 8vo. 14s net. 



Cambridge Agricultural Monographs 



The main puspose of this book is to put on record the results of the field experiments with rock phosphates and 

 open hearth basic slags conducted in Essex during the period 1915-1920. Dr E. J. Russell says in his preface: 

 " Dr Scott Robertson has the great advantage of being in close touch with the steel-making industry, and at the same 

 time of being able to carry out agricultural experiments. His monograph contains a store of information about the 

 new slags, and is a model of thorough and systematic investigation. It deserves close study by all who are interested." 



Cambridge University Press, Fetter Lane, London, E.C. 4: C. F. Clay, Manager 



THE UNIVERSITY OF CHICAGO PRESS 



Agricultural Economics 



By EDWIN G. NOURSE. A volume comprising several hundred 

 carefully edited selections with valuable original introductions, which 

 make of the material a connected whole. This book follows the plan, 

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 virtues of the usual text and the collateral book of readings. 



Particularly strong is the emphasis upon the interrelations of the 

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 economic principles. Chapter III of this book is a notable example of 

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 standing of the technical nature of the productive processes of agriculture. 

 Many selections also show how changing economic or commercial con- 

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 introduce new factors into the economic problem of agriculture, 

 xxvi + 896 pages, 8vo, cloth ; 24s net, 



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