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 tinder 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. When a beam is 



fitted with a full motion . ibid 



PAGE 



Parallel motion, formula for . . 233 



when radius rod 



works from a stated centre . ibid 



Rule III. . . 234 

 proportion of links . ibid 



- Rule IV. , . 235 



-RuleV. . . 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 . . . 1 6, 1 7 



'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 



