REPORT — 1901. 



TRANSACTIONS OF THE SECTIONS. 



Section A.— MATHEMATICAL AND PHYSICAL SCIENCE. 



THURSDAY, SEPTEMBER 12. 



Page 



Address by Major P. A. MacMauon, D.Sc, F.R.S., President of the Section 51St 



1. *0n Elastic Fatigue, as shown by Metals and AVoods. By Professor A. 

 Gray, F.R.S., J. S. Dunlop, and A. Wood 529 



2. The Clearing of Turhid Solutions, and the Movement of Small Suspended 

 Particles, by the Influence of Light. By Professor G. Quincke (p. 60) 529 



3. *0n the Relation between Temperature and Internal Viscosities of Solids. 



By Professor A. Gray, F.R.S 529 



4. Note on Hydrostatic Pressure. By W. Ramsay, F.R.S., and G. 



Seoter, B.Sc 529 



5. "The Freezing Points of certain Dilute Solutions. By E. H. Grif- 



fiths, F.R.S 530 



6. *The Buildings of the National Physical Laboratory. By Dr. R. T. 



Glazebrook, F.R.S '. ." 530 



FRIDAY, SEPTEMBER 13. 

 Department I.— Physics. 

 L Report on Electrical Standards (p. 31) 531 



2. Note on a Comparison of the Deposits in Silver Voltameters with 



different Solvents. By S. Skinner, M.A. (p. 32) 531 



3. The Discharge of Electricity through Mercury A'apour. By Arthur 



Schuster, F.R.S 531 



4. *Sur les Effets magnetique de la Convection electrique. Par Dr. V. 

 Crkmieu 531 



5. Photoelectric Cells. By Professor G. M. Minchin, M.A., F.R.S 531 



G. On the Necessity for Postulating an Ether. By B. Hopkinson 534 



7. On the Change of Conductivity of Metallic Particles under Cyclic Electro- 

 motive Variation. By Professor Jagadis Ohunder Bose, M.A., D.Sc... 534 



Department II. — Astronomy 

 Address by Professor H. H. Turner, D.Sc, F.R.S., Chairman 536 



1. On the Possibility of Systematic Error in Photographs of a Moving 

 Object. By A. R. HiNKS, M.A. 540 



