6 8 



Dr. C. Davison on the Diurnal 



and 572 at Nagoya there are only 175 whose times of oc- 

 currence differ by less than a minute ; and it does not follow 

 that even all these are identical, for, during the first day or 

 two, shocks were frequently felt at Gifu for several minutes 

 in succession. Though the two stations are less than 14 

 miles apart, and both are close to the great fault-scarp, it 

 would seem, from the above analysis, that their after-shocks 

 do not originate under quite the same conditions. 



8. Gifu: Nov. 11-Dec. 31, 1891, number of earthquakes 

 839 ; 1892, number of earthquakes, 865 ; 1893, number of 

 earthquakes, 272. Nemuro : Apr. 1894-Feb. 1895, number 

 of earthquakes, 347. 



Harmonic 

 Component. 



Gifu, 

 Nov. 11-Dec. 31, 1891. 



Gifu, 1892. 



Gifu, 1893. 



Nemuro, 

 Apr. 1894-Feb. 1895. 



Ampl. 



Epoch, 

 h m 



Ampl. 



Epoch. 

 h m 



A.M. 



5 3 

 9 



5 58 

 33 

 4 38 

 2 33 



Ampl. 



Epoch, 

 h m 



Ampl. 



Epoch, 

 h m 



1st (24 hours) ... 

 2nd (12 hours)... 

 3rd (8 hours) ... 

 4th (6 hours) ... 

 5th (4f hours) ... 

 6th (4 hours) ... 



•205 

 •119 

 •156 



•018 

 076 

 •137 



A.M. 



1 11 



2 55 

 29 



3 38 



52 



1 59 



•007 

 •171 

 •154 

 •048 

 •049 

 ■133 



•106 

 •087 

 •078 

 •138 

 •085 

 •095 



P.M. 



3 20 



AM 



10 43 



1 26 

 1 49 

 3 4] 

 1 59 



•062 

 099 

 •217 

 •053 

 •169 

 •205 



A.M. 



29 

 4 44 

 3 15 



1 31 



2 42 

 16 



Philippine Islands. 



9. Manila. — P. Miguel Saderra Maso : La Seismologia 

 en Filipinas (Manila, 1895), pp. 100-103. 



Duration of record, 1869-1889. Number of earthquakes, 



210*, 



Harmonic 

 Component. 



Ampl. 



Epoch. 

 h m 



1st (24 hours) 



•273 

 •136 

 •210 

 •310 



A.M. 



10 49 

 2 20 

 6 38 

 4 22 



2nd (12 hours) 



3rd (8 hours) 



4th (6 hours) 





* The total number of shocks in P. Saderra's catalogue is 213, but 

 three of these the exact time is not given. 



