V 



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Recoil Carves as Shown by the Hot- Wire Microphone. By Lieut. -Colonel 

 C. B. Heald, GB.E., M.D., and Major W. S. Tucker, R.E., D.Sc. Com- 

 municated by Prof. C. S. Sherrington, Pres. R.S. (Plates 5-8) 281 



The Velocity of the Pulse Wave in Man. By J. Crightort Bramwell, M.B., 



M.R.C.P., and A. V. Hill, F.R.S 298 



No. B 653.— May 1, 1922. 



On a Remarkable Bacteriolytic Element found in Tissues and Secretions. By 

 Alexander Fleming, M.B., F.R.C.S. Communicated by Sir Almroth Wright, 

 F.R.S. (Plate 9) 306 



The Pigmentary Effector System. T. — Reaction of Frog's Melanophores to 

 Pituitary Extracts. By Lancelot T. Hogben, M.A., D.Sc., and Frank R. 

 Winton, M.A. Communicated by Prof. E. W. MacBride, LL.D., F.R.S 318 



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 "Pejjtone'' on Blood and Immunity thereto. By J. W. Pickering, 

 D.Sc, and J. A. Hewitt, Ph.D., B.Sc. Communicated by Prof. W. D. 

 Halliburton, F.R.S 367 



No. B 654.— June I, 1922. 



Active Hyperemia. By D. T. Harris (Beit Memorial Research Fellow). Com- 

 municated by Prof. W. M. Bayliss, F.R.S 384 



The Acidity of Muscle during Maintained Contraction. By H. E. Roaf. Com- 

 municated by Sir C. S. Sherrington, Pres. R.S 406 



On the Heat Production and Oxidation Processes of the Echinoclerm Egg during 



Fertilisation and Early Development. By C. Shearer, F.R.S 410 



Further Observations on Cell-wall Structure as seen in Cotton Hairs. By 

 W. Lawrence Balls, M.A., Sc.D. (Cantab.), and H. A. Hancock. Com- 

 municated by Dr. F. F. Blackman, F.R.S. (Plate 10) 426 



Observations on the Distribution of Fat-Soluble Vitamines in Mamie Animals 



and Plants. By Johan Hjort, D.Sc, For.Mem.R.S 440 



No. B 655.— July 1, 1922. 



On Blood-Platelets: their Behaviuur in "Vitamin A" Deficiency and after 

 " Radiation," and their Relation to Bacterial Infections. By W. Cramer, 

 A. H. Drew, and J. C. Mottram. Communicated by Prof. W. Bulloch, F.R.S. 449 



Development of the Calcareous Parts of the Lantern of Aristotle in Echinus 

 miliaris. By D. W. Devanesen, M.A. Communicated by Prof. E. W. 

 MacBride, F.R.S. (Plates 11-15) 468 



