Heat, phenomena of, [29]
Hero of Alexandria, description of his machine, [41]
Hopper, the, or apparatus for supplying the fire-place with coals, [131]
Hornblower, Mr., his double-cylinder engine, [134]
Horse power and steam power, comparison between, [202]
Horse power of an engine, [291].
Method of calculating it, [293]
Howard, Mr. Thomas, his patent steam engine, [253].
Its advantages in navigation, [256]
Huskisson, Mr., [154]
I.
Inclined planes, their injurious effects on railroads, [194].
Methods proposed to remedy these, [194]