20 



ART. 10. — S. KUSAKABE. 



A glance at the above table will show what an important effect 

 on the elastic nature of the earth crust is produced by the drops 

 of water, which permeate beneath the earth's surface. 



To study more closely the effect of moisture, and especially 

 its effect as combined with high temperatures, a special arrange- 

 ment is now in preparation, the author hopes to be able to give 

 some observations on that special subject in the near future. 



VII. RELATION BETWEEN THE KINETIC AND 

 STATIC VALUES. 



Of the one hundred and fifty eight specimens given in the 

 table, a greater part have their elastic constants determined accord- 

 ing to the statical method by either Professor H. Nagaoka or 

 by the author himself. Now it is of no small interest to compare 

 the kinetic and the static values for one and the same specimen 

 of rocks. 



A short remark may here be added with respect to a new 

 system of co-ordinates specially fitted for percentage representation. 



