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On Electric Resistance Thermometry at the Temperature of Boiling 

 Hydrogen. By Professor James Dewar, M.A., LL.D., F.R.S. 

 (Plate 10) : 244 



Physical Constants at Low Temperatures. (1) — The Densities of Solid 

 Oxygen, Nitrogen, Hydrogen, etc. By Professor James Dewar, 

 M.A., LL.D., D.Sc., F.R.S 251 



No. 493.— May 7, 1904. 



On a Criterion which may serve to Test various Theories of Inheritance. 

 By Karl Pearson, F.R.S., University College, London 262 



Some Uses of Cylindrical Lens- Systems, including Rotation of Images. 

 By George J. Burch, M.A., D.Sc. Oxon., F.R.S., Lecturer in Physics, 

 University College, Reading 281 



On the Effect of a Magnetic Field on the Rate of Subsidence of 

 Torsional Oscillations in Wires of Nickel and Iron, and the Changes 

 Produced by Drawing and Annealing. By Professor Andrew Gray, 

 F.R.S., and Alexander Wood, B.Sc 286 



A Radial Area-Scale. By R, W. K. Edwards, M.A. Communicated 

 by Professor A. G. Greenhill, F.R.S 292 



On the Compressibility of Solids. By J. Y. Buchanan, F.R.S 296 



No. 494.— May 28, 1904. 



Croonian Lecture. — The Chemical Regulation of the Secretory Process. 

 By W. M. Bayliss, F.R.S., and E. H. Starling, F.R.S 310 



Experiments on a Method of Preventing Death from Snake Bite, 

 capable of Common and Easy Practical Application. By Sir Lauder 

 Brunton, M.D., F.R.S., Sir Joseph Fayrer, Bart., K.C.S.I., F.R.S., 

 and Leonard Rogers, M.D., B.S., etc., Indiau Medical Service 323 



The Effects of Changes of Temperature on the Modulus of Torsional 

 Rigidity of Metal Wires. By Frank Horton, D.Sc, B.A., St. John's 

 College, Cambridge ; 1851 Exhibition Research Scholar of the 

 University of Birmingham. Communicated by Professor J. J. 

 Thomson, F.R.S. (Abstract) 334 



The Sparking Distance between Electrically Charged Surfaces. — Pre- 

 liminary Note. By P. E. Shaw, B.A., D.Sc. Communicated by 

 Professor J. H. Poynting, F.RS 337 



Further Note on some Additional Points in Connection with Chloro- 

 formed Calf Vaccine. Bv Alan B. Green, M.A., M.D. (Cantab.). 

 Communicated by Dr. W.'H. Power, C.B., F.R.S 342 



Farther Experiments on the Production of Helium from Radium. By 

 Sir William Ramsay, K.C.B., F.R.S., and Frederick Soddy, M.A. .... 346 



Corrigenda in Mr. W. Shanks's Tables " On the Number of Figures in 

 the Reciprocal of a Prime." By Lieut.-Colonel Allan Cunningham, 

 R.E., Fellow of King's College, London. Communicated by the 

 Secretaries 359 



