The Association of Economic Biologists 



President 



Professor J. B. FARMER, D.Sc, F.R.S. 



Vice-Presidents 



Professor W. SOMERVILLE 

 A. G. L. ROGERS, Esq. 



Hon. Treasurer 



J. C. F. FRYER, Esq., 



The Pathological Laboratory, 

 Royal Gardens, 

 Kevv. 



Hon. Sec. for Publications 

 E. E. GREEN, Esq., 

 Way's End, 

 Camberlev. 



Hon. Secretary (General and Zoology) Hon. Secretary (Botany) 



S. A. NEAVE, D.Sc, W. B. BRIERLEY, Esq., 



89, Queen's Gate, S.W. 7 Rothamsted Experimental Station 



Council 



Lt.-Col. ALCOCK, I.M.S., F.R.S. 

 Prof. B. T. P. BARKER 

 S. E. CHANDLER, D.Sc. 

 F. J. CHITTENDEN 

 A. D. COTTON 



A. D. IMMS, D.Sc. 



R. T. LEIPER, D.Sc. 



G. A. K. MARSHALL, D.Sc. 



A. G. L. ROGERS 



Prof. W. SOMERVILLE 



1. 



3. 

 4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 



12. 

 13. 

 14. 



CONTENTS OF Vol. VI, No. 4 



On the Relations between Growth and the Environmental Conditions of 

 Temperature and Bright Sunshine. By Winifred E. Brenchley, D.Sc. 

 (With 13 Text-figures) 



Glomerella cinyulata (Stoneman) Spauld. and v. Sch. and its Conidial 

 forms, Gloeosporinm jnperatum E. and E. and Colletotrichum nigrum 

 E. and Hals., on Chillies and Carica papaya. By Jehangir Fardunji 

 Dastur, M.Sc. (With Plate X) .^ 



Field Experiments on the Chemotropic Responses of Insects. By A. D. 

 Imms, M.A., D.Sc, and M. A. Husain, B.A. (With 1 Text-figure) 



On Forms of the Hop {Humulua Lupulus L. and H. americanus Nutt.) 

 Resistant to Mildew {Sphaerotheca Ilnmuli (DC.) Burr.). By E. S. Salmon 



On the Sexual Forms of Aphis saliceti, Kaltenbach. By Maud D. Haviland 



Proceedings of the Association of Economic Biologists 



I. The Administrative Problem. By Sir A. D. Hall, K.C.B., F.R.S. 



II. The Training Problem. By Professor V. H. Blackman, Sc.D., F.R.S 



III. The Agricultural Problem. By E. J. Russell, D.Sc, F.R.S. . 



IV. The Horticultural Problem. By F. J. Chittknden, F.L.S., V.M.H. 



V. The Forestry Problem. By Professor W. Somerville, M.A., D.Sc. 

 D.(Ec 



VI. General Discussion ........ 



List of Members of the Association of Economic Biologists for 1920 

 Laws of the Association of Economic Biologists 



211 



245 



269 



293 

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333 

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 349 

 355 



