144 Experiments tn Boring for Fresh Water. 
deeper?) The “red hill” risés 80 to 100 feet above the foun- 
dation of the distillery, and exhibits the rock on its summit, 
and on its southern side, especially, for a distance of two or 
three miles. Its course is east and west. On the northern ~ 
side of the hill the red rock is found to rest on a hard, com- 
pact limestone, and water is here found, at a depth of from 
20 to 30 feet—springs “ never-failing,” but weak, are found 
among the ridges. ‘The more slaty part of the rock disinte- 
grates rapidly on exposure, but much of it is found to resist 
the action of the atmosphere; and to constitute a good build- 
ing stone: . 
sian calcareous slate rock ; and although they have discon- 
The expense of boring is, on an average, not more than 
23 dollars the foot, except when granite is encountered, when, 
perhaps, the chisel cannot penetrate more than three or four 
inches in a day. 
