CONTENTS. 



EEPOETS ON THE STATE OF SCIENCE. 



Page 

 Establishing a Solar Observatory in Australia. — Report of the Committee, 

 consisting of Sir David Gill (Chairman), Dr. W. G. Duffield (Secretary). 

 Dr. W. J. S. Lockybe, Mr. F. McClean, and Professors A. Schuster and 

 H. H. Turner 25 



Investigation of the Upper Atmosphere, in co-operation with a Committee 

 of the Royal Meteorological Society. — Tenth Report of the Committee. 

 consisting of Dr. W. X. Shaw (Chairman), Mr. E. Gold (Secretary). Messrs. 

 D. Archibald. C. Vernon Boys, C. J. P. Cave, and W. H. Dines, 

 Dr. R. T. Glazebrook, Sir Joseph Larmor, Professor J. E. Petavel, 

 Dr. A. Schuster, and Dr. W. Watson 27 



Seismological Investigations. — Sixteenth Report of the Committee, consisting 

 of Professor H. H. Turner (Chairman), Mr. J. Milne (Secretary). Mr. C. 

 Vernon Boys, Sir George Darwin, Mr. Horace Darwin, Major L. 

 Darwin, Dr. R, T. Glazebrook, Mr. M. H. Gray. Mr. R. K. Gray. Pro- 

 fessor J. W. Judd, Professor C. G. Knott, Professor R. Meldola. Mr. 

 R. D. Oldham, Professor J. Perry. Mr. \V. E. Plummer, Mr. Clem est 

 Reid, Professor R. A. Sampson, and Professor A. .Schuster. (Drawn up 

 by the Secretary) 30 



I. General Notes (Registers. Visitors, Exhibition. New Stations, 



Colonial Office) 30 



II. Double and Multiple Earthquakes ' 32 



III. Seismic Activity in Japan, Italy, and America, 1700-1900 .... 36 



IV. Synchronism of Seismic Activity in different Districts 36 



V. Megaseismic Frequency 38 



VI. Tidal-Load Observations at Ryde 39 



VII. Tidal-Load Experiments in Pennsylvanian Railway Tunnels . . 40 

 VIII. Experiments in Pits in the Midlands 40 



IX. List of Strong Shocks in the United States 41 



X. Destructive Earthquakes in Peru and North Chile 45 



XI. Unpublished Notes relating to Destructive Earthquakes 47 



XII. Seismic Activity 1899-1903 inclusive 55 



XIII. Sensibility of Seismographs recording on Smoked Surfaces .... 66 



