CONTENTS. V 



Page 

 Eadiation in a Magnetic Field. — Report of the Committee, consisting ot 

 Professor G. F. FitzGeeald (Chairman), the late Professor T. Preston 

 (Secretary), Professor A. Schusxee, Professor 0. J. Lodge, Professor 



S. P. Thompso:!^ , Dr. Gekald Mollot, and Dr. AV. E. Adeney 5'2 



Experiments for Improving the Construction of Practical Standards for use in 

 Electrical Measurements. — Report of the Committee, consisting of Lord 

 Ratleigh (Chairman), Mr. R. T. Glazebeook (Secretary), Lord Kelvijt, 

 Professors W. E. Ayetojt, J. Peeet, W. G. Adams, Olivee J. Lodge, and 

 G. Caret Foster, Dr. A. Muirhead, Sir W. H. Preece, Professors J. D. 

 Everett and A. Schuster, Dr. J. A. Fleming, Professors G. F. Fitz- 

 Geeald and J. J. Thomson, Mr. W. N. Shaw, Dr. J. T. Bottomlet, 

 Rev. T. C. Fitzpatrice, Professor J. ViRLiMtr Jones, Dr. G. Johnstone 

 Stonet, Professor S. P. Thompson, Mr. J. Rexnie, Mr. E. H. Griffiths, 

 Professor A. W. Ruckee, Professor H. L. Callendae, Mr. Geobge 



3lATTHEr, and Sir W. Roberts-Aitsten 53 



Appendix. — Note on an Improved Resistance Coil. By Robert 



S. Whipple ^5 



Photographic Meteorology. — Tenth Report of the Committee, consisting of 

 Professor 11. Meldola, Mr. A. W. Clatden (Secretary), Mr. J. Hopkin- 

 SON, and Mr. H. N. Dickson. (Drawn up by the Secretary.) 5G 



Seismological Investigations.— Fifth Report of tha Committee, consisting of 

 Professor J. W. Judd (Chairman), Mr. John Milne (Secretary), Lord 

 Kelvin, Professor W. G. Adams, Professor T. G. Bonney, Sir F. J. 

 Beamwell, Mr. C. V. Boys, Professor G. II. Daewin, Mr. Horace 

 Daewin, Major L. Daewin, Professor J. A. Ewing, Professor C. G. 

 Knott, Professor R. Meldola, Mr. R. D. Oldham, Professor J. Peeet, 

 Mr. W. E. Plummer, Professor J. H. Poynting, Mr. Clement Reid, 

 Mr. Nelson Richaedson, the late Mr. G. J. Stmons and Professor H. H. 



TUENEE 50 



I. On Seismological Stations ahroad and in Great Britnin 59 



II. Analyses of Earthquakes recorded in 1899. By J. Milne 60 



III. Earthquakes and Timekeepers at Observatories. By J. Milne... 105 



IV. Earthquakes and Rain. By J. Milne 106 



V. Earthquakes and Small Changes in Latitude. By J. Milne ... 107 



VI. Selection of a Fault — Locality suitable for Observations on Earth- 

 movements. By Clement Reid 108 



VII. On the Relative Movement of Strata at the Ridgeway Fault, 



By Hoeace Darwin 119 



Report on the Present State of the Theory of Point-groups. Paet I. 

 By Feances Haedcastle 121 



1. Introduction 121 



2. Historical Outline 121 



3. Analysis of the Subject according to Content '.... 123 



4. Brill's Memoirs on Elimination and Algebraic Correspondences, 



1863-1873 123 



Report on the Chemical Compounds contained in Alloys. By F. H. 

 Neville, F.R.S 131 



Paet I. — Methods of Discovery of Compounds 131 



„ Chemical Methods of Isolation 131 



„ Freezing-point Curves 13^ 



„ Microscopical Study 1-11 



„ Rcintgen-ray Photography ••-• 141 



„ Determination of Electrical Potential and other Physical 



Methods 142 



