I will apply Carnot's doctrine to this case.

Potential energy of the fuel with respect to absolute zero:

Units.

239.25 lb. × 530° abs. × 0.238 ...................... = 30,053

194.46 lb. × 17-1/8 × 530° × 0.238,

the weight and heat of air....................... 420,660

194.46 × 14,544 units heat of combustion of carbon... 2,828,200

---------

Total energy 3,278,813

Heat absorbed in evaporating 26.08 lb. of water

in fuel............................................ -29,888

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Available energy.......................... 3,248,425

Scientific American Supplement, No. 441, June 14, 1884. · 第 21 / 60 题