CONTENTS. xiii 



Page 



5. tAn Attempt at a Quantitative Theory of the Telephone. By Lord 

 Rayleigh, Sec. R.S 573 



6. tOn the Amplitude of Sonorous Waves -which are but just audible. By 

 Lord Eayleigh, Sec. R.S 573 



7. On the Production of Beat-tones from two Vibrating Bodies "whose 

 Frequencies are so high as to be separately inaudible. By Alfred M. 

 Mayek 573 



8. On the Variation of the Modulus of Elasticity with Change of Tempera- 

 ture as determined by the Transverse Vibration of Bars at Various 

 Temperatures. By Alfeed M. Mayer 573 



9. *0n an Apparatus for Measuring small Strains. By Professor J. A. 

 EwiNG, F.R.S 574 



10. On Mirrors of Magnetism. By Professor Silvantts P. Thompson, D.Sc, 

 F.R.S 574 



11. The Volume Changes which accompany Magnetisation in Nickel Tubes. 



By Professor C. G. Knotx, D.Sc. 576 



12. On Hysteresis in Iron and Steel in a Rotating Magnetic Field. By 



Francis G. Batly, M.A 576 



13. On the Vibrations of a Ijoaded Spiral Spring. By L. R. Wilber- 



FORCE, M.A 577 



TUESDA Y, A VG UST 14. 

 Department I. 



1. On Fuchsian Functions. By Professor Mittag-Lefflee 577 



2. On Ronayne's Cubes. By Professor H. Hennesst, F.R.S 578 



3. On a Property of the Catenary. By Professor H. Hennesst, F.R.S 578 



4. A Complete Solution of the Problem, ' To find a Conic with respect to 

 which two given Conies shall be Reciprocal Polars.' By J. W. Rus- 

 sell, M.A 578 



5. The Impossibility of Trigraphic Fields of Spaces. By J. W. Russell, M.A. 578 



6. On Maxwell's Method of deriving the Equations of Hydrodynamics from 



the Kinetic Theory of Gases. By Professor Ludwig Boltzmann 579 



7. *0n the Invariant Ground-forms of the Binary Quantic of Unlimited 

 Order. By Major P. A. MacMahon, R.A., F.R.S 579 



8. Princlpes fondamentaux de la Geom^trie non-euclidienne de Riemann. 



Par P. Mansion, professeur a 1' University de Gand 579 



9. Formulae for Linear Substitution. By Professor E. B. Elliott, 

 M.A., F.R.S 581 



Departments II., HI. 



Joint meeting with Section I to discuss the two following Papers : — 



10. *0n Experiments illustrating Clerk Maxwell's Theory of Light. By Pro- 

 fessor Oliver Lodge, F.R.S 582 



11. *0n an Electrical Theory of Vision. By Professor Oliver Lodge, F.R.S. 582 



Department II. 



12. *0n the Velocity of the Cathode Rays. By Professor J. J. Thomson, 

 F.R.S 682 



