PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 



Series B. Vol. 87. 



No. B 593. 



BIOLOGICAL SCIENCES. 



CONTENTS. 



Page 



The Trypanosomes causing Dourine (Mai de Coit or Beschalseuche). By 



B. BLACKLOCK, M.D., and WARRINGTON YORKE. M.D. (Plate 11) 89 



Studies in the Heat-production Associated with Muscular Work. 

 (Preliminary Communication : Section A. — Methods ; Section B. — 

 Results.) By J. S. MACDONALD, University of Sheffield ... 96 



The Formation of the Anthocyan Pigments of Plants. — Part VI. By 

 FREDERICK KEEBLE, Sc.D., F.R.S., Professor of Botany, University 

 College, Reading ; E. FRANKLAND ARMSTRONG, D.Sc, Ph.D., and 

 W. NEILSON JONES, M.A., Lecturer in Botany, University College, 

 Reading 113 



On the Question of Fractional Activity ("All or None" Phenomenon) in 

 Mammalian Reflex Phenomena. By T. GRAHAM BROWN (Carnegie 

 Fellow) 132 



On Postural and Non-Postural Activities of the Mid-Brain. By T. GRAHAM 



BROWN (Carnegie Fellow) 145 



Synthesis by Sunlight in Relationship to the Origin of Life. Synthesis of 

 Formaldehyde from Carbon Dioxide and Water by Inorganic Colloids 

 acting as Transformers of Light Energy. By BENJAMIN MOORE, D.Sc, 

 F.R.S., and T. A. WEBSTER 163 



The Nature of the Coagulant of the Venom of Echis carinatus, a Small 



Indian Viper. By J. O. WAKELIN BARRATT, M.D., D.Sc. Lond. . . 177 



printed for THE ROYAL SOCIETY and sold by 



HARRISON & SONS, 45, ST. MARTIN'S LANE, LONDON, W.C. 

 Price Five Shillings. 



No. B 593. 



October 16, 1913. 



