CONTENTS. XI 



Page 



7. On the Period of Rotation of the Sun as determined by the Spectroscope. 



By Henet Crew 583 



8, On the Diffraction Bands near the Edge of the Shadow of an Obstacle. 



By Professor G. F. Fitzgerald, F.R.S 584 



n. Recent Determinations of Absolute Wave-lengths. By LoTTis Bell 584 



10. Twin-Prisms for Polarimeters. By Professor Silyanfs P. Thompson, 

 D.Sc 585 



11. On the Existence of Reflection when the Relative Refractive Index is 

 Unity. By Lord Rayleigh, LL.D., Sec.R.S 585 



12. On the Magnetisation of Iron in Strong Fields. Bj' Professor J. A. 

 EwiNG, B.Sc, F.R.S., and William Low 58G 



13. On the Magnetisation of Hadfield's Manganese Steel in Strong Fields. 



By Professor J. A. Ewing, B.Sc, F.R.S., and William Low 587 



SATURDAY, SEPTEMBER 3. 



1. Second Report of the Committee on Electrolysis 588 



2. On some points in Electrolysis and Electro-convection. By Professor 



G. Wiedemann 589 



3. On Ohm's Law in Electrolytes. By G. F. Fitzgerald, F.R.S., and Fred. 

 Trotjton , 589 



4. Further Researches concerning the Electrolysis of Water. By Professor 

 Von Helmholtz '. 589 



5. Experiments on the possible Electrolytic Decomposition of Alloys. By 

 Professor W. 0. Roberts-Austen, F.R.S 589 



6. Experiments on the Speeds of Ions. By Professor 0. J. Lodge, F.R.S.... 589 



7. On Chemical Action in a Magnetic Field. By Professor H. A. Rowland 589 



8. On the Action of an Electric Current in hastening the Formation of 

 Lagging Compounds. By Dr. J. H. Gladstone, F.R.S 589 



9. Experiments on Electrolysis and Electrolytic Polarisation. By W. W. 

 Haldane Gee, B.Sc, Henut Holden, B.Sc, and Charles H. Lees, 

 B.Sc 589 



10. On the Electro-deposition of Alio vs. By Professor Silvantjs P. Thomp- 



son, D.Sc ■ , 590 



11. On the Action of the Solvent in Electrolytic Conduction. By T. C. 

 FiTZPATEICK, B.A 590 



32. On the Industrial Electro-deposition of Platinum. By Professor Silvantjs 



P. Thompson, D.Sc 590 



MONDAY, SEPTEMBER 5. 



1. On the Princeton Eclipse Expedition. By Professor C. A. Young, Ph.D., 

 LL.D 590 



2. Observations of Atmospheric Electricity. By Professor Leonti Weber.. 592 



3. The General Bibliography of Meteorology and Terrestrial Magnetism. 



Compiled by the Signal C)iBce at Washington. By Cleveland Abbe ... 593 



4. Fourth Report of the Committee appointed to co-operate with Mr. E. J. 

 Lowe in his project of establishing on a permanent and scientitic basis a 

 Meteorological Observatory near Chepstow 594 



