C. G. Rockwood—American Earthquakes. 353 
Art, XXXVI.—Notes on American Earthquakes: No. 12. By 
Professor C. G. Rockwoop, Jr., Ph.D., Princeton, N. J. 
THis article embodies such information as the author has 
obtained in regard to the earthquakes which occurred on the 
American continent and adjacent islands during the year 1882, 
with notice of some earlier ones not before reported here. - 
tems which depend on single sources of information usually 
have their source indicated ; and if regarded as doubtful, are 
printed in smaller type. 
. “or assistance in collecting information the author is again 
indebted to J. M. Batchelder, Esq., of Boston; to Professor 
F. E. Nipher, of the Missouri Weather Service; to Dr. J. W. 
Dawson, of Montreal; to Charles Carpmael, of the Meteorolog- 
leal Service of Toronto ; and especially to Mr. Edwin Rockstroh, 
of the Ynstituto Nacional, at Guatemala, to whose kindness are 
ion, 
The Monthly Weather Review of the U. S. Signal Service 
has also furnished much valuable information. 
1879, 
June 8—10.51 aw. An earthquake occurred at San José de 
Costa Rica. 
June 19.—3.00 a. a. A slight shock at Guatemala. 
Sept. 21.11.13 a. uw, A weak shock at San José de Costa Rica. 
Oct. 11.19.45 au. A slight shock at Guatemala, 
Nov. 18.—10,40 a. uw, A weak shock at San José de Costa Rica. 
Dee, 29.743 p,m. A somewhat strong earthquake at San José 
de Costa Rica. 
1880, 
Jan, 114.—8,42 p,u. A slight shock at Guatemala. 
The following were all at San José de Costa Rica. 
Jan. 7 and 26. Weak shocks. 
ar. 3.—9.50 a.m. A weak shock. 
Mar. 17.10.32 a. ua, A strong shock, 
May 15.—8.31 p. a». A light shock. 
May 226.17 p. w. _A light shock. 
y 25.—2.58 a.m. A strong shock of seven or eight seconds’ 
duration. 
July 13.—7.30 Pp, a. A weak shock. 
30.—10.04 p. m. An earthquake of three seconds’ duration. 
Am. Jour. Sor.—Tarap Serres, Vou. XXV, No. 149.—May, 1883. 
