COSTS. MARCH, 1884.

Anthracite Bituminous Coal gas

per ton of per ton of per 1,000

2,240 lb. 2,240 lb. cubic feet.

New York $4 00 $4 25 $1 75

Chicago 5 00 3 50 1 25

New Orleans 6 00 3 50 3 00

San Francisco 12 00 7 50 3 00

London 5 00 3 00 0 75

Port Natal 12 50 11 00

Sydney 12 00 7 00

Valpariso 11 50 7 50

Generator Crude Water gas

gas per 1,000 Petroleum per per 1,000

cubic feet. bbl. of 42 gal. cubic feet.

New York $0 45 $1 80 $0 50

Chicago 45 2 00 50

New Orleans 45 2 50 60

San Francisco 55 2 00 60

London 43 2 70 45

Port Natal Ap- 4 00 Ap-

Sydney proxi- 4 50 proxi-

Valparaiso mation. 3 00 mation.

In calculating the following table the specific gravity of coal gas is

taken at 0.4; generator gas at 0.44; water gas at 0.48; petroleum, 0.8.

Scientific American Supplement, No. 514, November 7, 1885 · 第 19 / 68 题