PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 

 Series B. Vol. 92. No, B 642. 



BIOLOGICAL SCIENCES. 



CONTENTS. 



Page 



Studies in the Mechanism of Enzyme Action. I. — Role of the Reaction of 

 the Medium in Fixing the Optimum Temperature of a Ferment. By 

 ARTHUR COMPTON. M.B., D.Sc. Mackinnon Student, British Medical 

 Association Scholar .......... I 



The Effect of Certain Dietary Deficiencies on the Suprarenal Clands. By 



C. H. KELLAWAY, Foulerton Student of the Royal Society. (Plate 1) 6 



The Growth of Seedlings in Wind. By LEONARD HILL, M.B., F.R.S. 

 (Director of the Department of Applied Physiology, National Institute 

 for Medical Research). (Plates 2 and 3) 28 



ReHex Times in the South African Clawed Frog. By W. A. JOLLY . . 3* 



Studies of Photo-synthesis in Marine Algae. 1. Fixation of Carbon and 

 Nitrogen from Inorganic Sources in Sea Water. 2. Increase of 

 Alkalinity of Sea Water as a Measure of Photo-synthesis. By 

 BENJAMIN MOORE. F.R.S.. EDWARD WHITLEY, M.A., and 

 T. ARTHUR WEBSTER . . . S» 



Obituary Notices of Fellows deceased : — Paiil Ehrlich ; S. Schwendener ; 



Sir Thomas Richard Eraser (with portrait) i — xvii 



PRINTED AND PUBLISHED FOR THE ROYAL SOCIETY BY 

 HARRISON & SONS. Ltd., 44—47, ST. MARTIN'S LANE. LONDON, W.C.2. 



Price Four Shillings and Sixpence. 



No. B 642. 



January 3, 1921. 



