72 Notice of the Geology of Troy. 
ur cursory notice of this work, we have cited « 
number of the most prominent facts which it contains, both 
because they are in themselves i rag. and because we 
were willing to call the attention of our readers both to 
them, and to the volume in ‘which they are contained. 
are, in our view, entitled to great respect, and we con- 
fess ourselves very much indebted to Mr. Schoolcraft for a 
at mass of valuable information, which, in a connected 
pate is, we believe, no where else to be found, His state- 
ments saa) regards the most valuable part) are drawn from 
is searches and observations, and have, avitestty 
been the eoakk of much effort, and of no small share of fatigue 
and personal privation. We: trust that so valuable a work 
will not stop with a single edition, and perhaps we might 
venture to suggest to the author, that in a second, he might 
advantageously condense into one view, some facts which 
are several times repeated in different parts of the volume ; 
as those respecting the granite and its connected rocks 
r 
gos eonsider the present work as an acquisition to our 
means of information respecting our mineral resources, and 
believe that it must be a regular volume of reference for all 
those who are interested in the investigation of these 
subjects. 
ssi Soh igke nes Notice of Ey —Extract of a 
letter to the Editor 
Tae city of Troy is situated on the east bank of the 
Hudson river, on an elevated. plain, from eighteen to twen- 
ty-four feet above the bed of the river. Tt is about one 
digging for wells, &c. we pass through a series of almost 
uninterrupted gravel, of the coarsest and most sterile kind, 
colours, and all worn smo rounded so as oe fi 
for paving streets, &c. : singe stisie are many of the 
size and ae as before mentioned of horn stone, 1s Pian 
stone, sino SP reaelas , chlorite, (connected with quartz) sili- 
ceous slate, ru » &c. Sometimes we meet with 
a stratum of coarse blue “clay or sand, but we uniformly 
