136 Experiments in Boring for Fresh Water. 
=” and the law of the formation of the successive terms 
vident. In the case of u, positive and integral, all the 
eit after + u x (u—1) xX (u—2) X &e. to (u— (u—1) inclu- 
1X2X3xX &e. to (7—1) inclusive 
sive a. X, eo equal eee for they all have the factor, u— 
u=o. The demonstration which I have here given, I be- 
lieve is new and satisfactory. 
t. XIX.—Notice of some recent experiments in boring 
ee fresh Water, and of a pamphlet on that subject. 
THE newspapers have, for some ci contained nodes of 
the operations and success of Mr. Disbrow, in oring for 
fresh water, in New-Jersey, and SE oe and often in situ- 
ations the most unpromising. The statements appea 
the first, to be well authenticated, and the extraordinary suc- 
a, which has continued to attend Mr. Disbrow’s efforts, has 
w drawn the public attention, so powerfully, to the subject, 
thot they will probably receive with no little satisfaction, a 
connected account of the several attempts te obtain fresh wa- 
ter by boring. This account is contained in “ An essay on 
: in 
wick. The author states that te practice of boring for coal 
and other minerals, has been known in Europe for the last 
fifty or sixty years, and that it has been applied, also, to ob- 
tain ‘a greater quantity of water in wells, that did not, at all 
times, afford a sufficient supply. It appears that a person, 
whose name is now forgotten, applied the art of boring to 
obtain salt water in our western States, the salt having been 
. only in the salt licks. His first trial was 
made in boring from the bottom of a deep well. Salt water 
was obtained; and it being found, that it rose ina tube, near- 
ly or quite to the surface, an attempt was made to bore with- 
out the aid of a well. The effort was successful, and water 
was obtained at the depth of 70 or 80 feet, “which rose and 
overflowed at the surface. 
The act was, afterwards, in the progress of these en- 
prosecuted in pei ees where the indications of 
salt were less distinct, and the auger was sunk to the depth 
of 400, 500, 700, and even 900 feet. By shutting out the 
