X CONTENTS. 



Page 



5. On the General Analogy between the formulaB of singly and doubly 

 Periodic Functions. By" J. W. L. Glaisher, M.A., F.R.S 548 



6. Sur les Stjries Hyperg^ometriques. By Professor Halphen 551 



TUESDAY, SEPTEMBER 6. 



1. Report of the Oommittee on Electrical Standards 551 



2. Report of the Oommittee for the Measurement of the Lunar Disturbance 



of Gravity 551 



3. On the Rainfall Observations made upon York Minster by Professor John 

 Phillips, F.R.S. By G. J. Stmons, F.R.S 551 



4. On Yolta-Electric Inversion. By Professor Silvantjs P. THOiirsoN, B.A., 

 D.Sc 552 



6. On the Rotational Coefficient in various Metals. By E. H. Hall 552 



6. On a Dynamometer Coupling. By Professors W. E. Atrton, F.R.S., and 

 John Perry, B.E 553 



7. On an Early Attempt at a Secondary Batterv. By Dr. C. W. Siemens, 

 F.R.S : 554 



■8. On an Electro-Ergometer. By Professor Sir William Thomson, M.A., 

 F.R.S 554 



9. On a Problem in Stream Lines. By Professor A. W. Ruckek, M.A 554 



10. On Potential due to Contact. By S. Lavington Hart, B.A., D.Sc, 



Scholar of St. John's CoUege, Cambridge 555 



11. On the Electric Discharge through Colza Oil. By A. Macfarlane, 

 M.A., D.Sc, F.R.S.E 556 



12. Representation graphique de la Formule des Piles. Discussion. Par le 

 Profe.?seur 0. M. Gariel, Agreg6 de Physique a la Faculte de Medecine 



de Paris, IngiSnieur des Ponts et Chauss(5es 556 



13. On an Easy Method of making Carbon Cells for Galvanic Batteries. 



By W. Symons, F.C.S : 557 



14. On an Antimonized Cellular Carbon Galvanic Battery. By \V. Symons, 

 F.C.S 557 



16. On the Absolute Sine Electrometer. By Professor G. M. Minchin, M.A. 558 



WEDNESDAY, SEPTEMBER 7. 



1. Report of the Committee on a Standard of White Light 559 



•2. Report of the Committee on Luminous Meteors 559 



3. Report of the Committee on the Thermal Conductivity of Rocks 559 



4. A Contribution to the History of the Algebra of Logic. Bv the Rev. R. 

 Harley, F.R.S ." 559 



6. On the Illuminating Powers of Incandescent Vacuum Lamps with 

 measured Potentials and measured Currents. By Professor Sir William 

 Thomson, M.A., F.R.S., and James T. Bottomley, M.A 559 



6. On Photometry, with Experiments. By Professor Sir William Thomson, 

 M.A., F.R.S .561 



7. On the Dynamical Theory of Radiation. By Professor Arthur Schuster, 

 Ph.D., F.R.S 661 



8. On a New Electrometer and some preliminary Experiments on Voltaic 



Action. By J. Brown 562 



