D. S. Martin—Earthquake of December, 1874. 193 
in, along the line of the Northern Railroad of New Jersey. 
Once over the Hudson, in the metamorphic region of New 
York and Westchester Counties, the shock was felt pS 
tween. Four points are reported in the heart of the city 
of — within a circle of half a mile across ; seo this 
not to admit of doubt. In a house fronting south on 113th 
street, ‘the sound approached from the south with a crescendo 
movement. As it struck the house the front windows rattled 
violently. About the middle of the room the sound, or shock, 
apparently reached its full volume, and then receded with a 
diminuendo movement. ‘The rear windows rattled precisely as 
those of the front.” (8) The direction of cracks in the ground. 
This effect was reported only at Closter, New Jersey, by Mr. 
J. L. Turnure, who kindly furnished a plan of the ground. 
Two narrow cracks appeared, of considerable depth, each on a 
distinct road, and both having a direction west-northwest and 
east-southeast, or transverse to the supposed line of movement. 
e duration of the shock was very variously estimated 
by different observers. It is quite ible that it may have 
varied with the nature of the ground ; bu but in general it would 
seem to have averaged about ten seco 
The general phenomena presented nothing peculiar. A loud 
rumbling sound, a heavy jar, and in some cases a distinct 
wave-motion, were the chief featinbes: In a few places bells 
were rung, clocks stopped, and cracks opened in the ground, 
as above. In only one case was the shock reported as felt on 
the water,—on a schooner in the harbor of New Rochelle. 
Very fortunately, the movement just stopped short of doing 
Am. Jour. Sct.—THIRD 4 aac aoa VoL. X, No. 57.—Sxpr., 1875. 
