INDEX. 



721 



Physiology, I. 738, II. 516. 

 Physiolo(;yofplants,TI.512. 

 Pianoforte, I. 398, 11. 274. 

 Piaz7.i, I. 508, 603, II. 326, 

 334,347,377,672,673,676. 

 Picard, I. 569, 600, 11. 152. 



D. 1682. 

 Pickel, II. 432. 

 Pictet, I. 370, 634, 635, 



637, 638, 706, 751, II. 



Ill, 148 . . 150, 283, 



384,467, 631,681, 682. 

 Picture, II. 21. 

 Picliircs, II. 142. 

 Picture* on a wall, II. 284. 

 Pidcrit, II. 415. 

 Pifeces sur Taiman, II. 436. 

 Piers, I. 163, 315. 

 Pietra mala, II. 494. 

 Pigment, II. 218. 

 Pigott, II. 270. 

 Pile, II. 206. 

 Pile engine, I. 225, PI. 18. 



II. 207. 

 Pile of Volla, I. 676, 752. 

 Piles, II. 216. 

 Piles. See Dcspiles. 

 Pjlgram, II. 447. 

 Pilots, II. 244. 

 Pin, I. 155. 

 Pinacograpbic instrument, 



II. Corrections. 

 Pincers, II. 204. 

 Pingr^, ir. 337, 365. 

 PJni, II. 172, 275, 497. 

 Pinion, I. 177, PI. 15. 

 Pinions, II. 183. 

 Pink dye, 11. 647. 

 Pinkerton, II. 367. 

 Pins, II. 189, 218. 

 Pint, II. 148, 150, 151. 

 Pipe, II. 151. Effect of 

 a short pipe, I. 280. 

 Vertical pipe, I. 285. 

 Pipemaking, II. 206. 

 Piper, II. 184. 

 Pipes, I. 293, 354, II. 205, 



VOL. II. 



221, 222, 245, 246, 539. 

 Musical pipes, I. 379. 

 Pipes of lead, I. 317. 

 Pipes of pumps, I. 335. 

 Pipes of wood, II. 211. 

 Pir!», 11. 492. 

 Pisce.s, I. 504. 

 Pise, I. 169, II. 175. 

 Pistols, II. 262. 

 Piston, I. PI. 23, II. 237. 

 Pistons, I. 332, II. 246, 248. 

 Pitchers, II. 175. 

 Pitot, I. 318,11. 239. 

 Pittacus, I. 237, 253. B. 



652, D. 570. B. C. 

 Pivots, II. 184. 

 rizzati, II. 121. 

 Places of the planets, II. 



310, 357, 372. 

 Places of the stars, II. 330, 



355. 

 Plagoscopc, II. 456. 

 Plain astronomy, I. 488. 

 Plane, 11. 9. 

 Pliine, IL 208. 

 Plane mirror, I. 415. 

 Plane mirrors, II. 282. 

 Pianos, Xl. 17. 

 Planetarium, I. 567, II. 



375. 

 Planetary aberration, II. 



294. 

 Planetary atmospheresj II. 



332. 

 Planetary orbit, II. 339. 

 Planetary worlds, I. 531, 



II. 346. 

 Planets, I.503,P1.32. 11.332. 

 Planing, II. 209. 

 Planispliercs, 1. 566, 11.371 . 

 Planks, I. PI. 10. 

 Planoconcave lens, I. 416. 

 Planoconvex lens, I. 416, 



II. 288. 

 Plant, I. 726, II. 367. 

 Plaster, II. 175, 213, 218. 

 Plaster for trees, II. 515. 



5 



Plaster of Paris, 1. 113. 



Plat, II. 189. 



Plate, II. 206, 208, 209. 



Plate glass, II. 287. 



Plate machine, I. 680, PI. 



40, II. 431. 

 Plates bandesj II. 176. 

 Platina, I. 610, II. 388, 



509, 510. 

 Platina for mirrors, II. 283. 

 Plating mill, II. 205. 

 Plato, I. 239, 744, 756, II. 



666,567. B. 429, D. 348. 



B.C. 

 Platrifcre. See Laplatrifcre. 

 Plaw, II. 174. 

 Playfair, II. 498. 

 Pleiades, I. 497. 

 Plempius, I. 638. 

 Pleurs, II. 495. 

 Pleyel, II. 572. 

 Pliers, II. 204. 

 Pliny, I. 530, 576, 746, 756, 



II. 567. B. 24,D. 79. 

 Plot, II. 266. 

 Plotting table, II. 116. 

 Plough, I. PI. 18, II. 167. 

 Ploughing, II. 212. 

 Pluchc, II. 129. 

 Plucknctt, II. 197. 

 Plumbery, II. 206. 

 Plumb line, II. 354, 359. 

 Plumier, II. 209. 

 Plunger pump, II. 249. 

 Plungers, I. 331, PI. 23, II. 



235. 

 Plurality of worlds, I. 532, 



II. 346. 

 Plusb, II. 187. 

 Plutarch, I. 239, 240, 598, 



745. 

 Pneumatic and bydrauliC' 



machines, II. 254. 

 Pneumatic apparatus, II. 



254. 

 Pneumatic equilibrium, I. 

 270, PI. 19, II. 60, 220. 



D 



Pneumatic experiments, II. 



254. 

 Pneumatic filter, II. 246. 

 Pneumatic macliines,1. 339, 



II. 252. 

 Pneumatics, I. 352,11. 263, 



378. 

 Pneumatostatics, I. 258, 



PI.. 19, II. 220. 

 Po, II. 224. 

 Poda, II. 249. 

 Poetry, I. 532, II. 563. 

 Point, II. 8, 151. Moving 



point, II. 130. 

 Pointed instruments,II.207. 

 Points, II. 118,485. 

 Points in electricity, 11.422. 

 Point velique, II. 240. 

 Polar circles, I. 570. 

 Polarity, I. 688, II. 439, 



440. Electric polarity, 



II. 419. 

 Polarity of a balance, II. 



159. 

 Polarity of light, II. 310. 

 Pole, II. 150, 203. 

 Poleni, I. 357, 366. B. 



1683, n. 1761. 

 Poles, I. 570. 

 Pole star, I. 496, II. 354, 



365. 

 Poli, IF. 482, 484. 

 Polished surface, I. 412. 

 Polishing, I. 231, II. 210* 

 Polishing lenses, II. 284. 

 Pollen, II. 514. 

 PoUey, II. 141. 

 Pollux, II. 567. 

 Polycratcs, I. 237. ^ 



PolydorusVergilins, 11.216. 

 Polygon, I. 26. 

 Polygonometry, II. lia. 

 Polygons, II. 118, 209. 

 Polygraph, I. 100, II. 143. 

 Polynoin als, II. 120. 

 Polynomial Uieorcra, II. 



144. 



