iv REPORT — 1902. 



REPORTS ON THE STATE OF SCIENCE. 



[^An asterisk * indicates that the title only is given. Tlie mark f indicates the same, 

 but with a reference to the Journal or Neivspa/per inwhich it is puhhshed in extenso.] 



Page 

 Experiments for Improving the Construction of Practical Standards for 

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

 Ratleigh (Chairman), Dr. R. T. Glazebrook (Secretary), Lord IvELViif, 

 Professors W. E. Atrton, J. Peery, W. G. Adams, and G. Caret Foster, 

 Sir Oliver J. Lodse, Dr. A. Muirhead, Sir W. XL Preece, Professors 

 J. D. Everett, A. Schuster, J. A. Fleming and J. J. Thomson, Dr. 

 W. N. Shaw, Dr. J. T. Bottomlet, Rev. T. C. Fitzpatrick, Dr. G. 

 Johnstone Stonet, Professor S. P Thompson, Mr. J. Rennie, Mr. E. H. 

 Griffiths, Sir A. W. Rijckbr, Professor H. L. Callendar, Sir W. C. 

 RoBERTS-AirsTEN, and Mr. George Matthey 53 



Appendix. — On the Definition of the Unit of Heat 55 



Comparing and Reducing Magnetic Observations. — Report of the Com- 

 mittee, consisting of Professor W. G. Adams (Chairman), Dr. C. Chree 

 (Secretary), Lord Kelvin, Professor G. Chrysi'al, Professor A. Schuster, 

 Captain K. W. Creak, the Astronomer Royal, Mr. William Ellis, and 

 Sir A. W. RiJCKER 58 



Seismological Investigations. — Seventh Report of the Committee, consisting 

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

 Kelvin, Professor T. G. Bonnet, Mr. C. V. Bots, Professor G. H. 

 Darwin, Mr. Horace Darwin, Major L. Darwin, Professor J. A. Ewing, 

 Dr. R. T. Glazebrook, Professor C. G. Knott, Professor R. Meldola, 

 Mr. R. D. Oldham, Professor J. Perrt, Mr. W. E. Plummer, Professor 

 J. H. Potnting, Mr. Clement Reid, Mr. Nelson Richardson, and 

 Professor H. H. Turner. (Drawn up by the Secretary.) 59 



I. On Seismological Stations abroad and in Great Britain 59 



II. The Instruments in use at Shide 60 



III. The Origins of the Earthquakes recorded in 1899, 1900, and 



1901 61 



IV. Duration of the First Preliminary Tremors 64 



V. Time Curves for Earthquakes recorded during the four years 



ending December 31, 1900 65 



VI. The Comparison of the Records obtained from three horizontal 



pendulums at Shide 68 



VII. Clinometric Experiments 70 



VIII. Vertical Spring Seismograph Experiments 71 



IX. On the Nature of Earthquake Movement 71 



X. Relationship between Rockfolding, Seismic, and Volcanic 



Activities 72 



XI. On the Comparison of Earthquake Registers from Shide, Kew, 



Bidston, and Edinburgh 73 



XII. Experiments at the Ridgeway Fault. By Horace Darwin ... 75 



