92. E. B. Andrews on the Geological Relations of Rock Oil. 
in a narrow range extending north and south, and little more 
than one hundred and twenty rods wide. On the west of this 
range many wells have been bored without success. The exact 
limit of the oil on the East is not yet known,—but wells, now 
eing bored, will soon determine it. The oil fissures are struck 
at different depths, as has been already shown, consequently 
there is no such thing as an “oil rock” as many suppose. — ‘I'he 
oil is found in any kind of stratum. Lach oil fissure doubtless 
extends vertically or nearly so, through many different strata. 
ese wells have been unparalleled for the quantity of oil 
produced, Many of them, when first bored, poured out the oil 
in torrents, the oil being forced up by the pressure of gas. 
Hundreds of barrels were obtained from a well in a few hours. 
The Camden, Lewellyn, Weare and Harper wells and doubtless 
Run. Both of them are now destroyed by wells that have takes 
away the gas. A salt well bored at the mouth of ree 
Spring Run, many years ago, yielded a large quantity of oi] an 
it was this salt well which caused attention to be directed to this 
locality, now so famous. 
ave thus shown some of the geological relations of the 
obtaine 
In the broken rocks, as found along the central line of a great 
uplift, we meet with the largest quantity of oil. It would appear 
to be a law, that the quantity of oil is in a direct ratio to the 
