Vll 



paoh 



On the Origin of the Ascidian Mouth. By A. G. Huntsman, B.A., M.B., Biological 

 Department, University of Toronto. Communicated by Prof. A. B. Macallum, 

 F.R.S 454 



No. B 590.— July 30, 1913. 



Some Investigations on the Phenomena of '' Clot " Formations. Part I. — On the 

 Clotting of Milk. By S. B. Schryver. Communicated by Prof. E. H. Starling, 

 F.R.S 460 



On the Action of Radium Rays upon the Cells of Jensen's Rat Sarcoma. By S. Russ, 

 D.Sc, and Helen Chambers, M.D. Communicated by H. G. Plimmer, F.R.S. 

 (Plates 12 and 13) 482 



On Light-Sensations and the Theory of Forced Vibrations. By George J. Burch, 



M.A., D.Sc. Oxon, F.R.S 490 



The Various Inclinations of the Electrical Axis of the Human Heart. Part I. — The 



Normal Heart. By A. D. Waller, M.D., F.R.S 507 



No. B 591.— August 26, 1913. 



Acinela tubcrosa ; A Study on the Action of Surface Tension in Determining the 

 Distribution of Salts in Living Matter. By A. B. Macallum, Ph.D., Sc.D., 

 LL.D., F.R.S., Professor of Bio-chemistry in the University of Toronto. 

 (Plates 14 and 15) 527 



Carbohydrate Metabolism in its Relation to the Thyroid Gland. — The Effect of 

 Thyroid Feeding on the Glycogen-content of the Liver and on the Nitrogen 

 Distribution in the Urine. By W. Cramer and R. A. Krause. Communicated 

 by Sir E. A. Schiifer, F.R.S 550 



Studies on the Processes Operative in Solutions (XXX) and on Enzyme Action 

 (XX). — The Nature of Enzymes and of their Action as Hydrolytic Agents. 

 By E. Frankland Armstrong and H. E. Armstrong, F.R.S 561 



Studies on Enzyme Action. XXI. — Lipase (III). By H. E. Armstrong, F.R.S., 



and H. W. Gosney, B.Sc 586 



OBITUARY NOTICES OF FELLOWS DECEASED. 



Lord Lister (with two portraits) ; George Robert Milne Murray ; Adam 



Sedgwick i-xxix 



Index xxxi 



