IV 



No. B 644.— May 2, 1921. 



On " Intertraction " between Albuminous Substances and Saline Solutions. By 



Sir Almroth E. Wright, M.D., F.E.S .". 118 



On the Local and Generalised Action of Radium and X-Eays upon Tumour Growth. 

 By S. Euss, D.Sc, Helen Chambers, M.D., and Gladwys M. Scott, Cancer 

 Eesearch Laboratories, Middlesex Hospital. Communicated by Sir Walter 

 Fletcher, F.E.S 125 



The Enzymes of B. coli communis. Part V. — (a) Anaerobic Growth followed by 

 Anaerobic and Aerobic Fermentation, {h) The Effects of Aeration during 

 the Fermentation. By E. C. Grey and E. G. Young. Communicated by Prof. 

 F. G. Hopkins, F.E.S 135 



Anthocyanins and Anthocyanidins. Part TV. — Observations on : (a) Anthocyan 

 Colours in Flowers, and {h) the Formation of Anthocyans in Plants. By 

 Arthur Ernest Everest, D.Sc, Ph.D., F.I.C., and Archibald John Hall, B.Sc, 

 A.LC. Communicated by Pi-of. F. Keeble, F.E.S 150 



No. B 645.- June 1, 1921. 



A Eemarkable FJint Implement from Selsey Bill. By Sir E. Eay Lankester, 



KC.B., F.E.S. (Plates 8-11) 162 



Eeversal of Asymmetry in the Plutei of Ecldnus miliaris. Bj- Hiroshi Ohshima. 

 (With Note by Prof. E. W. MacBride, F.E.S.) Communicated by Prof. E. W. 

 MacBride, F.E.S 168 



The Energy involved in the Electric Change in Muscle and Nerve. By A. V. Hill. 



F.E.S 178 



Crooxiax Lecture. — Eelease of Function in the Nervous System. By Henry 



Head, M.D., F.E.S 184 



Preliminary Eeport of the Mackie Ethnological Expedition to Cential Africa. By 

 the Eev. J ohn Eoscoe. Communicated by the Mackie Anthropological Expedi- 

 tion Committee. (Plates 12-16) 209 



No. B 646.— July 1, 1921. 

 A Quantum Theory of Colour Vision. By J. Joly, Sc.D., F.E.S 219 



The Effect of Eed Fatigue on the White Equation. By F. W. Edridge-Green, 

 C.B.E., M.D., F.E.C.S., Special Examiner and Adviser to the Board of Trade 

 on Colour Vision and Eyesight. Communicated by Prof. W. M. Bayliss, F.E.S. 232 



Dictyokinesis in Germ Cells, or the Distribution of the Golgi Apparatus during 

 Cell Division. By E. J. Ludfoi'd, B.Sc. (Lond.), and J. Brontii Gatenby, B.A., 

 B.Sc, D.Phil. (Oxon.). Communicated by Prof. J. P. Hill, F.E.S. (Plates 

 17 and 18) ., 235 



Break-shock Eeflexes and " Snprauiaxinial " Contraction-response of Maminalian 



Nerve-Muscle to Single Shock Stimuli. By C. S. Sherrington, M.D., Pres.E.S. 245 



