The Association of Economic Biologists 



President 



Professor NEWSTEAD, F.R.S. 



Vice- Presidents 



Professor CARPENTER, M.R.I.A. 

 Professor STANLEY GARDINER, F.R.S. 

 Professor HICKSON, F.R.S. 

 R. STEWART MacDOUGALL, D.Sc. 

 A. E. SHIPLEY, Sc.D., F.R.S. 



Council 



Prof. B. T. P. BARKER Prof. P. GROOM, D.Sc. 



S. E. CHANDLER, D.Sc. A. D. IMMS, D.Sc. 



F. J. CHITTENDEN Prof. W. MAXWELL LEFROY 



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



E. E. GREEN A. G. L. ROGERS 



Hon. Treasurer 



J. C. F. FRYER, Esq., 



The Pathological Laboratory, 

 Royal Gardens, 

 Kew, 



Hon. Secretary 



S. A. NEAVE, Esq., 



89, Queen's Gate, S.W.'? 



CONTENTS OF Vol. V, No. 1 



FAOB 



1. Physiological Pre-Determination : the Influence of the Physiological 



Condition of the Seed upon the Course of Subsequent Growth and 

 upon the Yield. I. The Effects of Soaking Seeds in Water. By 

 F. KiDD, M.A. (Cantab.), D.Sc. (Lond.), and C. West, D.Sc. (Lond.), 

 F.L.S. (With Plates I and II) 1 



2. "Reversion" and Resistance to "Big Bud" in Black Currants. By 



A. H. Lees, M.A. (With Plates III— VI) 11 



3. A "Wither Tip" of Plum Trees. By H. Wormald, M.Sc. (Lond.), 



A.R.C.Sc. (With Plates VII— IX) 28 



4. Oviposition in the Celery Fly. By T. H. Taylor. (With Fig. in Text) 60 



5. An Epitome of Bacterial Diseases of Plants in Great Britain and 



Ireland. By S. G. Paine 62 



6. " Internal Rust Spot " Disease of the Potato Tuber. {Preliminary 



communication.) By S. G. Paine 77 



