0. G. Rockwood—Notices of recent Earthquakes. 41 
over an area of 200 miles square; but were most severe in the 
neighborhood of Puget Sound. The following is from the 
“ Pacific Tribune,” Dec. 21, 1872 (Olympia, W. T.): ‘Capt. 
James S. Lawson took a scientific observation of the earth- 
quake on Saturday night last. Its direction was from the 
south to the north at first; subsequently it changed around to 
a course from the southwest to the northeast. It was timed 
with a chronometer watch and the direction noted by a swing- 
ing lamp. In an unofficial report to Prof. Davidson, at San 
Francisco, Capt. Lawson says : 
Dee. 14, 1872. Shock occurred precisely at 9° 403" p.m. It 
commenced with a light movement, gradually increasing for 
eighteen or twenty seconds. Then came the heavy shock, lasting 
four or five seconds; then it gradually decreased. In six minutes 
after the first shock there was another, followed by two others 
one minute apart. At 10" 12™ 40% there was another shock, and 
after 11 Pp. m, there were five others. 
uring the night other shocks were reported (b did not feel 
them), at 3 and 5 o’clock, 
unday evening, at 6" 374" a light shock. 
Dec, 16, at 9" 17" 30° a. m., another light shock.” 
A report from Walla Walla, Jan. 4, 1878, says that lightshocks 
had occurred almost daily up to that time. 
Jan. 9, 1873. A letter of March 28th, from Reykjavik, Ice- 
land, reports an eruption of Skaptar Jokull on Jan. 9th, which 
2. k 
which created considerable alarm, shaking the houses to their 
oundations,” 
. oh 12,1878. A severe shock was felt at Rome, Italy, at 
. . M. — Its direction was from southeast to northwest, 
and it lasted twelve seconds. The vibrations were strong 
Owe to ring bells and to stop the clock in the Astronomical 
bservatory 
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