CONTENTS. 



TRANSACTIONS OF THE SECTIONS. 



Section A.— MATHEMATICAL AND PHYSICAL SCIENCE. 



THURSDAY, SEPTEMBER li. 



Pa^e 

 A.ddress by R. T. Glazebeook, MA., F.R.S., President of the Section 671 



L Interim Report of the Committee on a National Physical Laboratory ... 681 



2. Interim Report of the Committee on Electro-optics 681 



3. Report of the Committee on Solar Radiation 681 



4. Report of the Committee for Comparing and Reducing Magnetic 

 Observations 681 



5. Report of the Committee in connection with the Magnetic Work of the 

 Falmouth Observatory 681 



6. On the Period of Vibration of Electrical Disturbances upon the Earth. 



By Professor G. F. FitzGerald, Sc.D., M.A., F.R.S., F.T.C.D 682 



7. The Moon's Atmosphere and the Kinetic Theory of Gases. By G. H. 



Bryan, M.A 682 



8. *0n Grinding and Polishing. By Lord Ratleigh, Sec.R.S 685 



9. Simple Apparatus for Observing and Photographing Interference and 

 Diffraction Phenomena. By W. B. Croft, M.A 685 



10. On Wilson's Theory respecting the asserted foreshortening of the inner 

 side of the Penumbrse of the Solar Spots when near the Sun's Ijiuib, and 

 of the probable thickness of the Photospheric and also Penumbral 

 Strata of the Solar Envelopes. By Rev. Fredekice; Howlett 686 



FRIDAY, SEPTEMBER 15. 



1. Report on the Present State of our Knowledge ot Electrolysis and 

 Electro-chemistry. By W. N. Shaav, F.R.S., and the Rev. T. C. 

 Fitzpateice; 688 



2. On the Connection between Ether and Matter. By Professor Oliver J. 

 Lodge, F.R.S. 688 



3. On a Mechanical Analogue of Anomalous Dispersion. By R. T. Glaze- 

 brook, M.A., F.R.S 688 



4. Note on Professor Ebert's Estimate of the Radiating Power of an Atom, 

 with Remarks on Vibrating Systems giving Special Series of Overtones 

 like those given out bv some Molecules. By Professor G. F. FitzGerald, 

 M.A., F.R.S .". 689 



5. On the Reflection of Sound or Light from a Corrugated Surface. By 

 Lord Raxleigh 690 



6. fOn the Piezo-electric Property of Quartz. By Lord Kelvin, Pres.R.S. . 691 



7. On a Piezo-electric Pile. By Lord Kelvin, Pres.R.S 691 



8. Electrical Interference Phenomena somewhat Analogous to Newton's 



Rings, but exhibited by Waves in Wires. By Edwin H. Baeton, B.Sc. 692 



