POUNDS OF WATER EVAPORATED FROM 212° 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.

Scientific American Supplement, No. 514, November 7, 1885 · 第 21 / 68 题