The steam engine familiarly explained and illustrated; with an historical sketch of its invention and progressive improvement; its applications to navigation and railways; with plain maxims for railway speculators. By the Rev. Dionysius Lardner ... With additions and notes by James Renwick ...

S22 INDEX.
P.
Paddlewheel, the common one, 257. Mr. Morgan's patent one, 259.
Papin, Denis, his contrivance, by which atmospheric pressure is rendered available
as a mechanical agent, 48. Description of his steam engine, 71.
Parallel motion, description of the, 95.
Piston, its velocity, 302,
Post-office steam packets, their speed, 268.
Potter, Humphrey, his contrivance for working the valves, 67.
Power of a steam engine, how estimated, 291.
R.
Railroads, first introduction of locomotives on, 151. Important effects to be ex
pected from their adoption, 155. Imaginary difficulty respecting the progression
of carriages on, 160. Various methods resorted to, to remedy this supposed dif-:ficulty, 161. One of these methods described, 162. Comparative estimate of
the expenses of locomotive and stationary engines, 168. Difficulties arising
from changes of level, 192. Inclined planes on, 194. Their great extension,
206. Comparison of, with turnpike roads, 213.
Railway speculators, plain rules for, 307.
Roads, their resistance to draft, 213. Compared with railroads, 213.
Robinson, Dr., 73.
"Rocket," description of the, 171.
Roebuck, Dr., assistance rendered by him to Watt, 87. His embarrassments, 88.
"' Sanspareil," description of the, 173.
Savery, Thomas, obtains a patent for an engine to raise water, 49. His discovery
of the principle of condensation, 49. Constructs the first engine brought into
operation, 50. Description of, 51. Inefficiency of, 57. Great consumption of
fuel necessary in his engines, 60. Different purposes to which he proposed to
apply the steam engine, 61. Limited power of his engine, 69.
Smeaton turns his attention to the details of the atmospheric engines, 73.
Solids converted into liquids by the application of heat, 27.
Solomon De Caus, description of the apparatus of, 43.
Somerset, Edward, Marquis of Worcester, invention of the steam engine ascribed
to him, 45. Description of his contrivance, 45. Similar to Savery's, 46. His
" Century of Inventions," 46.
Steam, its properties described, 30. Its mechanical power in proportion to the
water evaporated, 277. Its volume, 279. Its quantity of heat, 279. Its power
in respect of fuel, 280. Its expansive action, how advantageous, 280. Combination of expansion with condensation, 285. High pressure, its expansive
action, 288. Examples illustrative of its mechanical force, 305.
Steam carriages, —Mr. Gurney's, 216. Mr. Hancock's, 235. Mr. Ogle's, 238. Dro
Church's, 239.
Steam engine, first mover in, 19. Physical effects connected with, 20. Claims to
the invention of, 38. Efficacy of, as a mechanical agent, 39. First brought into
operation by Savery, 50. Its inefficiency, 58. First proposed to be applied to