Xll CONTENTS. 



Page 



4. On the Addition Theorem. By Professor Mittag-Lefplee 661 



5. Note on a General Theorem iu Dynamics. By Sir Robert Ball, F.ll.S 561 



6. The Asymmetric Probability Curve. By Professor F. Y. Edgewoeth, M A. 662 



7. On the Order of the Groups related to the Anallag-matic Diplacements of 



the Regular Bodies in w-Dimensional Space. By Professor P. H. Schoute 662 



8. On Mersenne's Numbers. By Lieut.-Colonel Allan Cunningham, R.E. 563 



9. End Games at Chess. By Lieut.-Oolonel Allan Cunningham, R.E. ... 564 



Department II. 



10. 'Experiments showing the Boiling of Water in an Open Tube. By Pro- 

 fessor Osborne Reynolds, F.R.S 664 



11. Report of the Committee on Earth Tremors 564 



12. Report of the Committee on Meteorological Photography 564 



13. Report of the Committee on Solar Radiation 564 



14. Report of the Committee on Underground Temperature 565 



15. Report of the Ben Nevis Committee 565 



16. On Recent Researches in the Infra-red Spectrum. By Dr. S. P. Langlet 565 



17. A New Determination of the Ratio of the Specific Heats of certain Gases. 



By O. LuMMEK and E. Peingsheim 565 



Department III. 



18. A Method for accurately Determining the Freezingrpoint of Aqueous 

 Solutions which Freeze at Temperatures just below 0° C. By the late 



P. B. Lewis. Communicated by Dr. Mejer Wildeemann 567 



19. The Influence of Temperature upon the Specific Heat of Aniline. By 



E. H. Griffiths, M.A 568 



20. On some Photometric Measures of the Corona of April 1893. By Pro- 



fessor H. H. Turner, M.A 568 



21. On Photographs of Spiral and Elliptic Nebulae. By Isaac Roberts, 

 D.Sc, F.R.S 569 



22. On the Formation of Soap Bubbles by the Contact of Alkaline Oleates 



with Water. By Professor G. Quincke 569 



23. On the Effect of Gases on the Surface Tension and Electrical Conductivity 



of Soap-films. By H. Stansfield 669 



24. On the Velocity of the Hydrogen Ion through Solutions of Acetates. By 



W. C. Dampier Whetham, M.A 569 



MONDAY, AUGUST 13. 



1. On the Results of a New Analytical Representation of the Distribution of 

 Magnetic Force on the Surface of the Earth. By Ad. Schmidt 570 



2. A Suggested Explanation of the Secular Variation of Terrestrial Mag- 

 netism. By Arthur Schuster, F.R.S 571 



3. On the Construction of Delicate Galvanometers. By Arthur Schuster, 

 F.R.S 572 



4. tOn the Minimum Current audible in the Telephone. By Lord Rayleigh, 



Sec. R.S 572 



