h = 14,500 C + 62,000 (H - O/8)
to compute the theoretical heating powers of these fuels. In the case of
methane, CH_{4}, the formula is not true, but the error is not great
enough to seriously affect the result. This gives for the combustion of
one pound of:
Anthracite 14,500 Br. Heat Units.
Bituminous 14,200 " " "
Petroleum 20,300 " " "
Coal gas 20,200 " " "
Generator gas 3,100 " " "
Water gas 8,500 " " "
Reducing the above to terms of pounds of water evaporated from 212° F.,
we have: