Evening journal., 1890-11-15
PIANOS, 81 Gents Per Day.
ORGANS, II Gents Per Day
w. F. BOOTHE,
I'll Market Street, Wilmington,
1416 Chestnut Street, Philadelphia.
eRANpYWINs Quar- TYING.

,tereating Artieie Frona the -scientifc
American on the Granite Industry OF
Thia City.
This weeks Scientific American con-
tains an interesting illustrated article on
the granite quarries on the Brandywine.
It is written by William L. Saunders.
He says:
Il have recently spent little time at
seme quarries In the South, notably the
extensive granite quarries OF the Brandy
wine Granite Company, on the Brandy
wine creek, Wilmington, Del visited
the brandywine quarries with q gentle
man from Brazil, who came here for the
purpose OF studying American methods
OF granite quarrying. He had been
through New England, and had been
told that the best way TO split up large
blocks WAS TO do 1t by ha d,
Just as he had been doing it in
Brszil. This statement was made by
men OF large experience in the New Eng
land quarries, and it made such an inn
preston upon him that 1t was necessary.
In order to Offset 1t, to show him actual
results We found at the BrandYwine
quarries a machine a6 work splitting up
blocks of granite readily, economically.
and satisfactorily. We got at the exact
facts In regard to it, which showed,
beyond dispute, that the work can be
done cheaper by machinery than by hand.
"But the most interesting feature OF
the Wilmington quarries Is the wire
cable hoisting and conveying apparatus.
| There are three of these corveyers reach
| ing from one side of tbe river to the
other, a distance of about 1,200 feet. The
stone Is quarried from both sides of the
river, though at present operations are
| going on, only on one side Blocks Of
| granite Weighing ten tons are lifted by
/ one man operating a hosting engine, and
/ by him transferred across the river and
| deposited upon q car. The conveyer
is q steel wire rope two inches In
diameter, anchored and resting upon
"a" frame braces at each end. The
cable may be either level or inclined as
desired The carriage travels either
way on the cable, being propelled by
means Of an endless rope operated by
hoisting engine This endless rope Is
sustained by carriers to prevent It's sag
ging By means of this rope the car
riage may be stopped and held at
J any point on the cable while the
stone is being hoisted or lowered The
hoisting and conveying may be carried
on either separately or together, In the
latter case effecting a great saving in
time
! while at the Brandywine quarries I
! saw a man lift large mass of stone
from the quarry, run 1t across the river
on the conveyer and deposit 1t on bank
there. There was no one on the other
side of the river, so the stone was dis
lodged by the man running the hoisting
engine The courteous and intelligent
secretary Of the Brandywine Company,
Mr.. H. NJ. BRrksdale, Informed me that
this stone was of size and kind for
which they had no orders at present, and
they were simply depositing it on the
other side of the river in
: order to get it out of the
way, intending to bring 1t back
) again and use it later on. Here
! was a means by which quarryman
/ | could. with bnt little expense. deposit
: his different grades Of stone in different
I Jumps on line with each other. keeping
: his yard clear and free from all unused
!. stone, and having a means by which hs
= can pick up block at any time that will
|. nearest conform to an order which he
= has In hand. That the Brandy wine
quarries are producing stone econically
is evident from the fact that they are
: supplying 8 large amount Of finished
4 stone for use on the Sodom dam, ON the
: New York aqueduct."