C. G. Rockwood—Recent American Karthquakes. 21 
Relation between the velocity of the wind and the distance between 
the isoburs. 
Veloc. | Dist. 1 Veloc, | Dist. | Veloc. | Dist. | Veloc. | Dist. | Veloc. | Dist. 
2 
3 
4 
5 
6 125 16 100 26 92 36 63 46 46 
t 7 
8 
9 
10 
There are thirty-five cases reported of velocities exceeding 
fifty miles per hour, one of them amounting to seventy-one 
determined from observations at stations distant 100 miles from 
each other. Such exceptional velocities may result from a 
strong upward movement of the air in the neighborhood of the 
station of observation. 
In preparing the materials for this article I have been 
assisted by Mr. Henry A. Hazen, a graduate of Dartmouth 
College of the class of 1871. 
Art. IL.—WNotices of Recent American Earthquakes. No. 7; 
by Professor C. G. Rockwoon, Jr., College of New Jersey. 
In the following notices, those based upon single newspaper 
reports, and which could not be otherwise verified, are p 
in smaller type, and the source of the information is in icated. 
For information received I am indebted to John M. Batchelder 
of Boston, Fred. E. Goodrich of the Boston Post, Principal J. 
W. Dawson of Montreal, Professor E. T. Quimby of Dartmouth 
College and others. 
- 1876.—May 10. A shock at Santa Barbara, Cal.—(U. 8. Sign. 
erv.) : 
Aug. 16. At 1.15 p.m. The bark Forest Queen experienced a 
heavy shock of fifteen seconds duration in lat. 41° 55' N., long. 
126° 25’ W.., off the southern part of Oregon.—(U. 8. Sign. Serv.) 
