Geological Survey. 361 
nouncing or modifying them, when farther research has 
shewn them no longer tenable. ' ~~ 
We have greatconfidence in the general correctness of Mr. 
Eaton’s opinions, and statements of facts in this report, and 
they exhibit a view equally pleasing to the geologistand to the 
political economist. ‘The former will be gratified in con- 
temp'ating the most important geological formations, pre- 
vailing with great uniformity through a vast extent of — 
country; and the latter will learn with satisfaction, that 
they embrace a multitude of -useful things, such as slates, 
and limestones and marbles, of many varieties, sandstones 
and mill-stone grits, beds of Iron ore and of plaister of Pa- 
ris, rich deposites of sali, and strong presumptive evidences 
of mineral coal. The salt, the plaister, the hydraulic 
lime, and the iron ore of this region, are deposites of ines- 
timabie value. How happy was the discovery of hydraulic 
lime in inexhaustible quantity, and of superior excellence, 
in the very places where it was wanted, for the massy 
sub-aqueous masonry of the locks, bridges, culverts, and 
aqueducts ; and who can estimate the importance, to fu- 
ture generations, of the salt and of the iron ore, which, 
with profuse bounty, are spread by the Creator over this 
favoured region. We have been very strongly impressed 
~ with the unparalleled magnitude of the deposite of iron, 
which, according to Mr. Eaton’s observations, extends, 
for more than two hundred and forty miles. We 
know not that the world affords a similar instance. 
Mr. Eaton’s book will form a very valuable guide to 
the geological traveller, through the region which it 
describes. Every such traveller will keep it in his 
hand, and thus opportunities will constantly be afford- 
ed, of examining the correctness of the author’s observa- 
tions, of enlarging them in some instances, and of pursu- 
ing them more in detail, and of correcting errors, should 
any have been committed, for in a survey, so extensive 
and arduous, it would be surprising, shouid no errors be 
hereafter discovered;—but Mr. Eaton, by mentioning, 
with great particularity, the places upon which his con- 
clusions are founded, has put it in our power to review his 
labours at leisure. Additional contributions to science, 
agriculture, and the arts, may confidently be expected in 
a region, which is already found to be prolific in important 
Vou. VIII.—No. 2. 46 
