Correspondence. 329 
The great extent and value of the Carboniferous formations render 
detailed descriptions necessary, and as a consequence about 670 pages 
(1916 to 2588) are devoted to it. There are large numbei-s of sections 
and maps and the treatment is as exhaustive as could be made in the 
space at command. There is a noticeable lack of remarks, conclusions 
and suggestions such as characterize the first portion of the summary 
by Prof. Lesley. 
The last part of the last volume is occupied by a description of the 
"New Red" rocks of Berks and Montgomery counties, by Benj. S. Ly- 
man. It is a succinct account of this formation. 
Taking the volumes as a whole, the "summary" is a success and a 
credit to the authors, especially to Prof. Lesley, and to the State. The 
great number of plates makes it useful and interesting to many who 
might find the text dry. Some typographical errors have crept in, but 
this is not surprising when the mass of material to be gone over is con- 
sidered. J. F. James, M. D. 
Higham, Mass., Aug. 27, 1896. 
Good Ground, Long Island. The Montauk division of the Long 
Island railroad leaves the terminal moraine at Jamaica, going east, and 
runs south of it for the distance of about seventy miles until the sta- 
tion of Good Ground is reached, about a mile and a half west of the 
Shinnecock range of hills. The southeastern portion of the frontal 
plain — the overwash of the glacier — is almost valueless for agricultural 
purposes. Good Ground, as its name implies, seems to be an excep- 
tion. On the fourth of July last, the writer paid a visit to this inter- 
esting locality for the purpose of observation. A short ride on the car 
from Eastport brought me to the station at Good Ground. 
The terminal moraine lies between the station and Peconic bay, and 
a journey of ahout a mile and a half on foot brings the traveler to 
Squire's Grove, situated on the southern shore of this beautiful expanse 
of water above named. The so-called englacial till is not very deep, 
and covers stratified beds of sand and gravel which are exposed in the 
banks along the country road. The boulders are quite plentiful and 
lie very near the surface. They consist for the most part of gneissie 
granite, trap, and sandstone, doubtless brought over from Connecticut. 
On nearing the bay, I could see the old familiar water channels 
branching out from it. One large arm stretches out through Squire- 
town to the southwest, forming a valley in which are some of the best 
farm lands. On reaching the beach, the inlet to the Canoe Place canal 
is about a mile to the east, with a high blutf intervening. Part of the 
bluff has been worn away by the inroads of the tides, and the beach is 
lined with boulders that lie like herds of cattle along the pebbly shore; 
many of them are larger than a good-sized ox. One can hardly realize 
that they have been transported so far from their native bed, and there 
is little wonder that the primitive mind regarded them with supersti- 
tious awe. The Long Island Indians had their legends as to their ori- 
