V 



PAGE 



The Production of Anthocyanins and Anthocyanidins. — Part III. By Arthur 



Ernest Everest, D.Sc, Ph.D. Communicated by Dr. F. W. Keeble, F.K.S 251 



Note on the Nature of Growths in Colloidal Silica Solutions. By H. Onslow, 

 Trinity College, Cambridge. Communicated by Prof. F. G. Hopkins, 

 F.R.S 266 



No. B 629.— October 17, 1918. 



Brevity, Frequency of Rhythm, and Amount of Reflex Nervous Discharge, as 

 indicated by Reflex Contraction. By N. B. Dreyer and C. S. Shen'ington, 

 F.R.S 270 



Ceoonian Lecture. — The Physiological Basis of Thirst. By Major Walter B. 

 Cannon, M.R.C., U.S. Army ; George Higginson Professor of Physiology, 

 Harvard University 283 



The Mechanism and Control of Fibrillation in the Mammalian Heart. By J. A. 



Mac William, F.R.S 302 



No. B 630.— December 20, 1918. 



The Artificial Production of Echinoderm Larvae with Two Water-Vascular Systems, 

 and also of Larvfe Devoid of a Water-Vascular System. By E. W. MacBride, 

 F.R.S. (Plates 4-10) 323 



Changes of Electrical Conductivity under Geotropic Stimulation. By James 



Small, M.Sc. (Lond.), F.L.S. Communicated by Dr. A. D. Waller, F.R.S 349 



No. B 631.— February 17, 1919. 



Researches on Growth and Movement in Plants by Means of the High Magnifi- 

 cation Crescograph. By Sir Jagadis Chunder Bose, assisted by Guruprasanna 

 Das, L.M.S. Communicated by Prof. S. H. Vines, F.R.S 364 



Investigations dealing with the State of Aggregation. Part IV. — The Flocculation 

 of Colloids by Salts containing Univalent Organic Ions. By S. B. Schryver, 

 D.Sc, and Nita E. Speer. Communicated by V. H. Blackman, F.R.S 400 



No. B 632.— April 1, 1919. 



Observations on Changes in the Blood Pressure and Blood Volume following 

 Operations in Man. (Preliminary Communication.) By Captain H. C. 

 Bazett, M.C., R.A.M.C. Communicated by Prof. W. M. Bayliss, F.R.S 415 



On the Cooling and Evaporative Powei's of the Atmosphere, as Determined by 



the Kata-thermometer. By Leonard Hill, F.R.S., and D. Hargood-Ash 438 



The Influence of External Concentration on the Position of the Equilibrium 

 attained in the Intake of Salts by Plant Cells. By Walter Stiles, M.A., 

 Lectui-er in Botany in the University of Leeds, and Franklin Kidd, M.A., 

 D.Sc, Fellow of St. John's College, Cambridge. Communicated by Prof. 

 Bayliss, F.R.S , 448 



