4380 ©. G. Rockwood, Jr—American Earthquakes. 
such a way as to indicate the intensity at each, according to the 
adopted scale, as inferred from the reported phenomena, and 
three curves of intensity were drawn. The largest curve in- 
cludes all stations reporting except Titusville, Pa. The next 
curve includes all those where the intensity reached III, except 
Boston, Mass., and Rutland, Vt. The inner curve includes all 
those reaching IV. The only places where the reported in- 
tensity reached V were Jamaica and Amityville in the western 
part of Long Island. At Jamaica it was stated that ‘the 
walls of the Presbyterian Sunday School were cracked in two 
places, the openings being from one to two inches in width and 
extending from the roof to the foundation.” At Amityville 
it was reported that “a large mirror which reached from the 
ceiling to the floor was cracked from the top to the bottom and 
the walls of the room were cracked in two places. A broom 
handle can be laid in the cracks in the walls.” 
miles long by 70 miles wide. The long axis of this ellipse 18 
closely parallel to the general direction of . 
chain in this region. At thirty places within this area, fallen 
bricks, cracked plaster, etc., testified to the power of the earth- 
quak e shock was reported from Titusville in north west- 
ern Pennsylvania, but was apparently not felt at any other 
place in that direction beyond Williamsport. sae 
_ The time observations which appear most reliable are given 
in the following table: 
PLACE. OBSERVER. | Time APTER 14h. 
Prof. Horsford. 6™ 308. 
6™ 505 
W. D. Johnson. tbe 38 
Prof. H. A. Newton. 7m 38 to 778 + 2ore- 
Cc. G. wood. m, 
Prof. C. A. Young. 7m 308 + 4 or 5°. 
| § W. F. Burr. i m 308 + 2°. 
P. M. Reese. 7m 208 to 7 3 
8. McElroy. 8™ 308, 
- ~~ is K. Hasbrouck. 8m, 
i a Bae : pe) i \ Oo. ym 955, ¢ 
