The Association of Economic Biologists 



President 

 Sir DAVID PRAIN, C.M.G., CLE., LL.D, F.R.S. 



Vice-Presidents 



G. A. K. MARSHALL, C.M.G., D.Sc., F.Z.S., F.E.S. 

 A. G. L. ROGERS, Esq. 



Hon. Treasurer lion. Sec. for Publications 



A. D. IMMS, D.Sc, E. E. GREEN, Esq, 



Rothamsted Experimental Station, Way's End, 



Harpenden Camberley 



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



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



Rothamsted Experimental Station 41, Queen's Gate, S.W. 7 



Council 



Prof. B. T. P. BARKER J. C. F. FRYER 



Prof. V. H. BLACKMAN, F.R.S. Prof. F. KEEBLE, F.R.S. 



Prof. A. E. BOYCOTT, F.R.S. R. T. LEIPER, D.Sc. 



S. E. CHANDLER, D.Sc. G. A. K. MARSHALL, D.Sc. 



F. J. CHITTENDEN M. C. RAYNER, D.Sc. 



A. D. COTTON A. G. L. ROGERS 



CONTENTS OF Vol. VII, No. 4 



PAGE 



1. Notes on a Cestode occurring in the Haemocoele of House-Flies in 



Mesopotamia. By J. H. Woodger, B.Sc. (With 3 Text-figures) . 345 



2. On Carrageen. Ghondrus crispus. By Paul Haas and T. G. Hill. 



(With 5 Text-figures) 352 



3. Frit Fly (Oscinis frit) in Winter Wheat. By F. R. Petherbridge . 363 



4. Some Remarks on the Methods formulated in a recent article on 



" The Quantitative Analysis of Plant Growth." By R. A. Fisher . 367 



5. The Influence of Soil Factors on Disease Resistance. By Albert 



Howard, CLE. (With 5 Text-figures) 373 



6. The Plant as an Index of Smoke Pollution. By Arthur G. Ruston, 



B.A., B.Sc. (London), D.Sc. (Leeds). (With Plates XXIV and XXV) 390 



7. Methods in the Quantitative Analysis of Plant Growth — A Reply to 



Criticism. By G. E. Briggs, F. Kidd and C. West . . . 403 



8. A Tomato Canker. By Ethel M. Doidge. (With 5 Text-figures 



and Plate XXVI) 407 



Proceedings of the Association of Economic Biologists .... 431 



