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:

Scientific American Supplement, No. 514, November 7, 1885 · 第 20 / 68 题