JOURNAL OF THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSITY, 

 TOKYO, JAPAN. 



VOL. XX., ARTICLE 10. 



Kinetic Measurements ol the Modulus of Elasticity 



FOR 



158 SPECIMENS OF ROCKS: 



AND 



A NOTE ON THE RELATION BETWEEN THE STATIC AND THE KINETIC VALUES 



OF THE SAME.* 



S. Kusakabe, Rigakushi. 



With one 'plate. 



CONTENTS. 



I, Introduction. 

 II. Method of Measurement and Apparatus. 



III. Test of the Apparatus with a Tuning-fork and a Prism 

 of Soft Iron. 



IV. Preliminary Experiments, and the Process of Calcula- 

 tion. 



V. Experimental Eesults. 

 VI. Effect of Moisture. 

 VIL A Note on the Relation between the Static and the 

 Kinetic Values of the Modulus. 



* The essence of this report was read in the meetings of the Tokyo Physico-Mathema- 

 tical Society for Sep. 1904 and April 1905 ; and was published in Nos. 15 and 22, Vol. 

 II, Proc. of the Society. 



