CONTENTS. V 



Page 

 I. The Gray. Milne Seismograph 81 



II. Observations with Horizontal Pendulums 84 



(a) The Instruments 85 



(6) Observations at Kamakura 88 



(c) The Diagrams 90 



(d) The Movements of the Pendulums 90 



(e) Earthquakes 91 



(/) The Observations in Tokio 94 



{ff) Sensitiveness of the Instruments 94 



(A) DailyTilting 95 



{{) Extract from Journal of Records obtained in 1894 96 



(j) The Wandering of the Pendulums 99 



'k) Movements of Water in a Well 104 



(Z) An Experiment on Evaporation 106 



(ot) Effects produced by emptying a Well 107 



(w) Earthquakes 108 



(o) Tremors 109 



(p) Observations at Yokohama and Kanagawa 109 



(y) Conclusions 110 



III. The Tokio Earthquakes of June 20, 1894 Ill 



IV. Miscellaneous 112 



Investigation of the Earthquake and Volcanic Phenomena of Japan, Fif- 

 teenth Eeport of the Committee, consisting of the Right Hon. Lord 

 Kelvin, Professor W. G. Adams, Mr. J. T. Bottomlet, Professor A. H. 

 Gkeen, Professor C. G. Knott, and Professor John Milne (Secretary). 

 (Drawn up by the Secretary) 113 



I. The Gray-Milne Seismograph 113 



II. Observations with Horizontal Pendulums 115 



(a) The Instruments, Installation, Character of Movements 115 



(b) Daily Wave Records 122 



(c) Tremors, Microseismic Disturbauces, or Earth Pulsations 126 



(d) The Slow Displacement of Pendulums 128 



(e) Periodic movements of several days' duration, and wandering 



of the pendulums 129 



(/) The Daily Change in the Position of the Pendulums 1 30 



iff) The Diurnal Wave 131 



(A) Tremors 139 



(t) Meteorological Tables for Tokio 143 



(_/) Earthquakes recorded by Horizontal Pendulums in Tokio 147 



III. Description of a Catalogue of 8,33] Earthquakes recorded in Japan 



between January 1885 and December 1892 149 



(a) History of the Catalogues 149 



(b) Explanation of the Catalogues 151 



