PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 



Series B. Vol. 93. 



No. B 653. 



BIOLOGICAL SCIENCES 



CONTENTS. 



Page 



On a Remarkable Bacteriolytic Element found in Tissues and Secretions. 



By A. FLEMING, M.B., F.R.C.S. (Plate 9) 306 



The Pigmentary Effector System. I. — Reaction of Frog's Melanophores 

 to Pituitary Extracts. By L. T. HOGBEN. M.A., D.Sc, and 

 F. R. W1NTON, M.A. . 3«8 



Relationships between Antiseptic Action and Chemical Constitution with 

 special reference to Compounds of the Pyridine, Quinoline, Acridine 

 and Phenazine Series. By C. H. BROWNING, J. B. COHEN, F.R.S., 

 R. GAUNT, and R. GULBRANSEN 329 



The Action of " Peptone " on Blood and Immunity thereto. By 



J. W. PICKERING, D.Sc, and J. A. HEWITT, Ph.D.. B.Sc 3<*7 



PRINTED AND PUBLISHED FOR THE ROYAL SOCIETY BY 

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



Price Three Shillings. 



No. B 653. 



May 1, 1922. 



