MEMOIRS 



OF THE 



SCIENCE DEPARTMENT, 



TOKIO DAIGAKU 



(Uni\'ersit)' of Tokio) 

 No. 9. 



EARTHQUAKE MEASUREMENT 



BY 



J. A. EWING, U.W.., F.K.Ö.K., 



Professor of Mechanical Ekginekrikg akd Physics in the Ukiveksitt of Tokio, 

 Vice-Presiuent op the Seismoi.ogicai. Society of Japak. 



PUBLISHED BY TÖKIÖ DAIGAKU 



TÖKIÖ: 



2543 (Jaimneso Era.) 

 1883 A. n. 



