\fdO'^ - Old Forge Coal Mines

RAILROAD CONSTRUCTION. 289
yards. As cart and driver cost $1.40 per day, the cost of
hauling is r-~-r^ =7.7 cents per cubic yard. Foreman and
lo. lo
water-carrier together cost $3.25. The gang contains
12 carts, which together carry 18.18x12 = 218.2 cubic
yards.
$3 ' 25
218. 2
= 1.49 cents per cubic yard for water-carrier
and superintendence. As loosening soil costs 2 cents per
cubic yard, dumping and spreading 1 cent per cubic yard,
and wear of carts and tools | cent per cubic yard, we have
the total cost per cubic yard as follows:
Loosening soil 2.00 cents per cubic yard.
Shoveling into carts 4.28 cents per cubic yard.
Hauling
and water-car-
7.70 cents per cubic yard.
Superintendence
rier
Wear and tear of carts and tools,
1.49 cents per cubic yard.
0.50 cents per cubic yard.
Dumping and spreading
1.00 cents per cubic yard.
Cost for delivering on the dump, 16.97 cents per cubic yard.
(868) See Art. 1499.
(869)
(870)
(871)
See Art. 1499.
See Art. 1500.
See Art. 1500.
(872) In carrying the steam a long distance through
iron pipes its pressure is greatly reduced by condensation,
whereas compressed air may be carried a great distance
without suffering any loss in pressure excepting that due tc
friction and leakage.