334 C. G. Rockwood—WNotices of Recent Earthquakes. 
Oct. 7 and 12, 1874.—Severe shocks and subterranean noises 
near Mazatlan, Mexico. 
Oct. 26, 1874.—An “unusually heavy” shock in Chili about 
0° 12™ a.m. Its duration was about thirty seconds and direc- 
tion east to west. The Director of the National Observatory 
reports that it was followed by a rise of 2°2 of the ther- 
mometer. 
Noy. 11, 1874.—Trembling and subterranean rumbling at 
Guanajuato, Mexico. any houses injured. 
Noy. 12, 1874.—A slight shock about 10 P. M. at Virginia 
City, Nev. 
Nov. 18, 1874.—Two shocks, each lasting ten seconds, were 
felt at Vera Cruz, and along the Mexican coast. Several 
houses were destroyed. Shocks continued to be felt at inter- 
vals for at least ten days. 
Nov. 18, 1874.—A slight shock at Guayaquil, Ecuador. 
Nov. 24, 1874.—A slight shock at Salem, Newburyport and 
throughout Essex County, Mass. Direction west to east. 
Nov. 29, 1874.—T wo laavy shocks at Oreana, Nev. * 
Dec. 10, 1874.—A somewhat severe shock was felt through- 
out Westchester and Rockland Counties, N. Y., and Bergen 
County, N. J. It extended as far as Peekskill on the north 
and Norwalk, Conn., on the east. The time is stated generally 
as half-past ten P. M. (one observer giving 10" 23"). The dura- 
tion is variously estimated from three seconds to one minute, 
the majority, however, putting it at five or six seconds. The 
direction of the vibration appears to have been from northwest 
to southeast, the reports being about equally divided between 
west, northwest and north, only one observer giving northeast. 
The shock was most severe in the neighborhood of Tarrytown 
and Nyack, but did no damage anywhere. It was at all places 
accompanied by subterranean noises, which are described as a 
long rumble ending with a violent explosion. 
Jan. 7, 1875.—A shock at Valparaiso, Chili. 
Jan. 18, 1875.—A shock in Ecuador. 
Feb. 7, 1875.—Three shocks at San Francisco, the first about 
A. M., the second at 10" 45™ a. m., lasting two seconds, wit 
the motion vertical and vibrations north and south; the third 
at 11" 45™ a. M., not so heavy as the preceding. 
Feb. 9, 1875.—Three slight shocks at Preston, Conn., not felt 
across the river in Norwich. 
Feb. 11, 1875.—An earthquake at Guadalajara, Mexico, ex- 
tending to San Cristabal and destroying houses in both places. 
March 10, 1875.—A shock at 12M. in the vicinity of Isse- 
quena, Goochland County, Va. 
‘My thanks are due to John M. Batchelder, Esq., of Boston, 
for information received. 
New Brunswick, N. J., March 20, 1875. 
