242
INDEX.
PAGE
Paddle wheels, table of experiments on, made
at Maudslay and Field’s manufactory App. 55
experiments to ascer
tain the effect of fixing the paddle
boards at an angle with the radius of
the wheel . . — 58
experiments on Her
Majesty’s ship Lightning, to ascertain
the difference of speed due to different
amounts of power . — 62
do. Dee . — 64
do. Phoenix — 65
ratio of speed of a steam
boat to the power . — 67
performances of Her
Majesty’s Post Office steam packets — 68
—— * speed and consumption
of coals of nine of the most recently
constructed of Her Majesty’s steam
vessels . . — 71
comparison of the re
sistance of a steam vessel with that of
a plane surface . — 76
Paddles . 301, 302, 308, 309, 314, 315
number of . . .307
power of . 302, 303, 304, 314
modification of . 308, 309
reefing of . 61
Papin, Dr. . 5, 7, 9, 16, 25, 31, 139
’s suggestion of employing the expan
sion and contraction of steam under a
piston to form a vacuum . . 5
’s suggestion of a steam engine being
applicable to impel machinery . 8
’s engine . . . ibid
Parabola . . . 226
Parabolic paddles . . . 305
Parallel motion . . 28, 33, 35, 230
Case I. Where two beams
are connected by a link, the segments
of the link are inversely proportional to
the radii of the beams . . 231
Rule I. . . 232
Rule II. . . ibid
Case II. WLen a beam is
fitted with a full motion . . ibid
Parallel motion, foi'mula for .
PAGE
233
rod
works from a stated centre
. ibid
Rule III.
234
proportion of finks
. ibid
Rule IV.
235
Rule V.
236
for steam boat engines
. ibid
point for the air pump
rod
to be attached
237
to fix the radius bar
. ibid
form of curve described by
the piston rod
238
rules for
232, 234
practical rules for
App. 216
Passages, steam, area of
94
Payne, John
16
’s experiment to determine the den-
sity of steam .
. 16, 17
’s disperser
17
Peacock, G., master of the Medea
. App. 83, 94, 98
Pendulum, conical .
263
Perkins, Jacob
214, 221
Perronet
31
Petroleum
. 55, 79
Phosphorus, effect of as fuel .
108
Pipes
254
Pistons .
. 10, 213
Barton’s
219
Cartwright’s
218
Jessop’s
221
Hall's
334
Lloyd’s
334
Smeaton’s .
216
Woolf’s .
217
metallic . . 34,
214, 218
principles of action
221
pressure on
. 23, 36
rules for
App. 222
slide
209
construction of
214
arrangement of
. ibid
thickness of
. ibid
leather
215
atmospheric engine
216