JOUENAL or THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSITY, 

 TOKYO, JAPAN. 



VOL. XX., ARTICLE 9. 



Modulus of Elasticity of Rocks'-^ 



AND 



SOME INFERENCES RELATING TO SEISMOLOGY. 



By 

 S. Kusakabe, Rigakushi. 



With two plates. 



CONTENTS. 



I. Introduction. 



II. Arrangement and Flexure-apparatus. 



III. Process of Observation and Calculation. 



IV. Experimental Results. 



V. Some Inferences relating to Seismology. 



INTRODUCTION. 



The present experiments, detailed descriptions of which are 

 to be found in " The Publications of the Earthquake Investiga- 

 tion Committee in Foreign Languages " No. 17, Tokyo, 1904, 

 serve as a complement to the note, recently published by the 



* A short abstract is to be found in the " Proceedings of the Tokyo Physico-Mathematical 

 Society" Vol. IL, No. 11. May, 1904. 



