CAMBRIDGE UNIVERSITY PRESS 



CAMBRIDGE AGRICULTURAL MONOGRAPHS 



General Editors: T. B. Wood, M.A., and 

 E. J. Russell, D.Sc. 



Inorganic Plant Poisons and Stimulants. By Winifred 



E, Brenchley, D.Sc, F.L.S., Fellow of University College, London. 

 With 19 illustrations. Royal 8vo. 5s net. 



Plants Poisonous to Live Stock. By Harold C. Long, 



B.Sc. (Edin.), of the Board of Agriculture and Fisheries. Royal 8vo. 



CAMBRIDGE FARM INSTITUTE SERIES 



General Editors: Professor T. B. Wood, M.A., and 

 E. J. Russell, D.Sc. 



The volumes of this series are intended to meet the needs of the many 

 Farm Institutes already in existence or about to be formed. They are 

 intended for the average student whose object is to farm, rather than for the 

 exceptional man who wishes to become an agricultural expert. 



Now ready 



Farm Accounts. By C. S. Orwin, Hon. M.A. 3s net. 

 A Student's Book on Soils and Manures. By E. J. 



Russell, D.Sc. 3s 6d net. 



Fungoid and Insect Pests of the Farm. By F. R. 



Petherbridge, M.A. With 54 illustrations. 4s net. 



UNIVERSITY OF CAMBRIDGE SCHOOL OF 

 FORESTRY BULLETINS 



The Production and Utilisation of Pine Timber in 



Great Britain. Part I. Production. By E. R. Burdon, M.A., 

 Investigator in Timber, and A. P. Long, B.A., Assistant Investigator. 

 No. I. Sample Plots of Scots Pine at Woburn. Demy 8vo. Paper 



covers, is 6d net. (Bulletin, No. i.) 

 No. 2. Sample Plot of Scots Pine at King's Lynn. Demy 8vo. 

 Paper covers, gd net. (Bulletin, No. 2.) 



THE JOURNAL OF AGRICULTURAL SCIENCE 



Edited by 



R. H. BiFFEN, M.A., F.R.S., A. D. Hall, M.A., F.R.S., 

 E. J. Russell, D.Sc, and T. B. Wood, M.A. 



Price per volume, consisting of four parts, 15s net in paper covers, i8s 6d 

 net bound in buckram; to subscribers, 15s net per volume, post free, payable 

 in advance. The price of each part sold separately is 5s net. 



Cambridge University Press 



Fetter Lane, London: C. F. Clay, Manager 



I [p. T. O. 



