164 AGRICULTURAL RESEARCH AND THE FARMER : 



Co-operation in Agriculture, (i) Theoretical, (Oxford Tracts on Economic 



Subjects, No. 14, Oxford Univ. Press.) 

 Co-operation in Agriculture, (2) Historical and Descriptive. {Oxford 



Tracts on Economic Subjects, No. 16, Oxford Univ. Press.) 

 The Economics of Large and Small Farms. {Oxford Tracts on Economic 



Subjects, No. 24, Oxford Univ. Press.) 

 The Value of Economic Study in Agricultural Education and Farm 



Management. {Journ. of the Univ. College of Wales, X, 1921.) 

 Standards of Production in Agriculture. {Paper read at the Brit. Assoc. 



Adv. of Sci., Edinburgh, Sept., 1921, to be published in the Edinburgh 



Review, Jan. 1922.) 

 Woods. K. S. 



The Rural Industries Round Oxford. {Oxford Univ. Press, 1921.) 

 Fitz- Randolph, Helen. 



Besom-Making in Derbyshire and Nottinghamshire. {Journ. Min. 



Agric, Vol. XXVIII, 5.) 



ADVISORY CENTRES. 

 Armstrong College, Newcastle-on-Tyne. 

 Collins, S. H., and Spiller, Arnold. 



Sugar in Oat Straw and Cattle Foods. {Journ. Soc. Chem. Ind., 1920, 

 pp. 66T and 82T.) 



University College of North Wales, Bangor. 

 Robinson, G. W. 



The Physical Properties of the Soil in Relation to Survey Work. {Chem. 

 News, July ist, 1921.) 



School of Agriculture, Cambridge. 

 Petherbridge, F. R. 



Potato Spraying Trials in the Cambridgeshire Fens, •1919. {Journ. 



Min. Agric, Vol. XXVII, No. 3, June, 1920.) 

 The Life-History of the Strawberry Tortrix Oxygrapha Comariana 



(Zeller). {Ann. App. Biol., Vol. VII, No. i, Sept., 1920.) 

 Observations on the Life History of the Wheat-bulb Fly {Leptohyleniyia 



coarctata. Fall). {Journ. Agric. Sci., Vol. XI, Part I, Jan., 1921.) 

 Frit Fly {oscinis frit) in Winter Wheat. {Ann. App. Biol., Vol. VII, 



No. 4, Feb., 1921.) 



School of Botany, Cambridge. 

 Brooks, F. T. 



Plant Sanitation in fruit plantations. {Trans. Brit. Myc. Soc, 1920.) 

 Investigations on some Tomato Diseases. {Trans. Brit. Myc Soc, 1921.) 



University of Leeds. 

 Hanley, J. A. 



The Need for Lime on Ploughed-out Grass Land. {Bull. 115, Univ. of 

 Leeds and York Cncil. for Agric. Educ.) 

 Comber, N. M. 



A Qualitative Test for Sour Soil. {Journ. Agric. Sci., 1920, X, 420.) 

 The Flocculation of Soils. {Journ. Agric. Sci., 1920, X, 425.) 

 The Flocculation of Soils, II. {Journ. Agric Sci., 1921, XI, 450.) 

 The Mechanism of Flocculation in Soils. {Trans. Faraday Soc, 1921, 

 XVII.) 



