ON SEISMOLOGICAL INVESTIGATIONS. 71 
senting an area of not less than two continents. The number given to 
an earthquake corresponds to that which is given to the same disturbance 
in the Shide Register published in British Association circulars. On 
the map, a number underlined means that it was recorded all over 
the world, but if it is not underlined means that it only disturbed 
a hemisphere. For the methods in which the positions of origins 
have been determined reference must be made to the British 
Association Report, 1911. When the time at which an earthquake 
originated is followed by plus or minus so many minutes, this means 
that there is a corresponding uncertainty in the position of its origin. 
The names of places at which an earthquake has been felt are followed 
by the letter F. If destruction has taken place, this is indicated by 
the letter D. The dotted lines on the map are the axes or troughs of 
districts from which megaseisms have radiated. 
Time yes Lat. and Long. Remarks 
Date No. at Origin District of Origin e F=Felt ; D=Destructive 
1904 hems, s 
Jan. 7] 804 | 14.50ca M, 175 E. 508. 
ee LO" 805 2.46 KF, 155 E. 758. 
» 20} 806 | 14.50-+2 B 82 W. 7 N. | Costa Rica and 
Panama, F. 
» 291 807 0.643 F, 143 E. 3 N 
Feb. 4) 810 | 20.40+2 D, 85 W.18 
Mar. 1] 820 | 16.10+2 M, 178 W. 138. 
ar 4} 823 | 10.19+3 D, 76 W. 128. | Lima, D. 
»  16| 823b | 17.25ca F, 160 E. 0 N.S. | Determined from 
Manila, Batavia, 
Christchurch and 
Honolulu 
> 19) 826 6.28-+2 D, 71 W. 298 Chile, Vallenar, D. 
oy aol |). 82 2.161 K, 89 E. 31 N 
et ieee oe K, 89 E. 31 N : 
: 10. < ox !/| Macedonia, Kossovo 
April 4| 834 { ine } K, 23 E. 42 N ce Mea te 
35 5 | 835 | 10.20 K, 105 E. 30 N. | China, Ssuchuan, D. 
Also Taichu, For- 
mosa, 10°20, F. 
» _,10.| 836 8.51.5 K, 23 E. 42 N. 
» ll | 837 | 13.55ca F, 165 E. 13 S. 
» 12} 838 | 18.48ca P 175 W. 44 N. 
» 14] 839 1.8+3 F, 135 E. 15 N. 
» 24] 841 6.38 E, 126 E. 23.5N. | Formosa, Tainan, D. 
May 1] 845 6.37ca M, 178 W. 33 S. 
35 1| 847 | 15.24ca F, 130 E.2.N. | Ceram, Amahei, at 
15.29, F. 
a 1| 848 | 23.20ca F, 130 E. 2 N. 
ste 14 | 851 | 14.0ca ie 170 W. 47 N. 
June 7 857 8.15 E, 144 E. 38 N. 
» 18 | 857c | 6.6ca M, 139 W. 148. 
» 24] 858 1.4 E, 160 E. 53 N. | Petropaulovski, F. 
» 25 | 859 | 14.46 FE, 160 E. 53 N. Ps 
» 25] 860 | 21.1 E, 160 E. 53 N. ne 
»  26| 861 | 10.41 EK, PQ 166 E. 42 N. aS 
a 20 |, 863 0.10 E, 160 E. 53 N. 55 
July 1] 865 | 13.29 E, 148 E. 42 N. 
» 10! 869 | 23-0ca H 45 W. 10N. 
