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.

POUNDS OF FUEL FOR $1.00. MARCH, 1884.

Anthracite. Bituminous. Petroleum. Coal Water Generator
gas gas. gas.

New York 560 527 156 18 74 76
Chicago 448 640 142 24 74 76
New Orleans 374 640 114 10 74 76
San Francisco 187 299 142 10 62 62
London 448 747 104 40 82 79
Port Natal 179 204 71 Ap- Ap-
Sydney 187 320 63 proxi- proxi-
Valparaiso 195 299 94 mate. mate.

These figures, multiplied by the actual evaporative powers as
calculated, give:

POUNDS OF WATER EVAPORATED FROM 212 deg. F. FOR $1.

Anthracite. Bituminous. Petroleum. Coal Generator Water
gas gas. gas.

New York 5040 4643 2948 338 220 577
Chicago 4032 5638 2684 451 220 577
New Orleans 3366 5638 2155 188 220 577
San Francisco 1683 2634 2684 188 179 484
London 4032 6581 1966 751 228 640
Port Natal 1611 1797 1342 Ap- Ap-
Sydney 1683 2819 1191 proxi- proxi-
Valparaiso 1755 2634 1776 mate. mate.

RELATIVE COSTS.

Anthracite. Bituminous. Petroleum. Coal Generator Water