On g-hephng Stiaia:i in Durham, N. Setipshies 4 243 
i the s spontaneous manufacture of salt. I say 
the floor, because I have ascertained that all the salt-springs 
along the canal route, from Lenox to Montezuma, are sup- 
ported on the same continuous rock. 
It has long been a prevailing theory, that a vast mine of 
salt exists in the vicinity of these springs, which is continu- 
ally dissolving, and thus yields the supply of salt water. 
Much time and money have been spent without success, in 
boring to great depths with the expectation of bets 2g 
this mass of rock salt. But if such rocks as Nine- 
mile Creek, be found of sufficient extent, the ice of the 
salt waters of the west will find a more satisfactory solution. 
And there may be many kinds of rock, besides the water 
limestone, which contain the elementary constituents: Nea 
common salt.» lam, et eepeeunry: 
° 2 a. You urs, &c. a 
_ AMOS 
Troy, Pah ae 823. 
REMARK. 
The observation made by Mr. Eaton is very interesting ; 
but (if we understand him correctly,) the water-limestone 
forms the roof of the salt-springs, or, at least, is so situated, 
that the water can percolate this stratum, by the natural ef- 
fect of gravity. We can have no doubt, that this is Mr. 
Eaton’s meaning, although there is some Prsinale sa be in va 
language. “ Edito 
Arr, IV.—On a i Stone i in 7 magia New-Hamp- 
shir » ‘By. Jacos B. Moo 
Concord, N. H. Oct. 22, 1823. 
ROFESSOR SILLIM 
Sim—Having noticed inthe last Sumber of the “Ameri- 
can Journal of Science” an account of a Rocking Stone in 
Patnam county, New-York, in which mention is also m 
of the rock at Durham in this State,—I take the liberty to 
enclose you a description of that rock, which you may rely 
upon as accurate. : 
~ $ 
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