702 



INDEX. 



Fata Morgana, I, 441, II. 

 301, 314. 



Faujas deSt. Fond, II. 494. 



Faurc, II. 431. 



Fecundation of plants, II. 

 514. 



Felbiger, II. 446, 485, 489. 



Felice, II. 380. 



Felling timber, II. 168. 



Felt, 1. 186. 



Felting, I. 189. 



Felts, II. 189. 



Fens, II. 495. 



Fenwick, II. 141. 



Ferber, II. 494, 497. 



Fer de la Noverre, II. 234. 



Ferguson,II. 112, 127, 130, 

 325, 416. 



Fermat, I. 475, 598, II. 

 377. 



Fern, 11. 512. 



Fernel, II. 360. 



Fernelius, II. 363. See cor- 

 rections. 



Fcrrein, II. 550. 



Ferro, II. 494. 



r«rroni, II. 116.119. 



Ferry boat, II. 242. 



Fibres, II. 184, 680. 



Fidler, I. PI. 8. 



Field glass, I. 430, PI, 28. 



Field of a micrometer, II. 

 289. 



Field of view, II, 80. 



Field of vision, II. 575. 



Fiery meteors, II. 500. 



Figure of fluids, II. 380. 



Figure of gravitating bo- 

 dies, 11.339. 



Figure of secants, II. 374, 



Figure of sines, II. 25, 122, 

 545, 558. 



Figure of snow, II. 478. 



Figure of tangents, II. 122. 



Figure of the eartli, I. 568, 

 ri. 34, II. 358. 



Figures, II. 124. 



Figures of the planets, II. 



332. 

 Files, II. 207 . . 209. 

 Filing, II. 210. 

 Filtering wells, II. 246. 

 Filters, II. 246. 

 Filter with sand, II. 246. 

 Finger board, II. 274. 

 Fir, II. 509. 



Fire, I. 037, II. 175, 383. 

 Fire arms, II. 202, 260. 

 Fire balls, II. 411, 499, 



501. 

 Fired gunpowder, 11. 260. 

 Fire engines, I. 334, 353, 



PI. 23, II. 247, 263. 

 Fire escapes, II. 181. 

 Fire in the Apennines, II. 



499. 

 Fire ladder, II. 175. 

 Fire places, II. 410, 412. 

 Fires, II. 490. 

 Fires. Extinction of fires, 



11.410,413. 

 Fire ship, II. 242. 

 Fire wheel, II. 257. 

 Firmness, II. 383. 

 First movers, 11. 164. 

 Fir wood, II. 47. 

 Fischer, II. 217. 

 Fish, II. 229, 291. 

 Fishery, II. 519. 

 Fishes, I. 304, 497, 735, 



II. 271,311,312. 

 Fish hooks, 11. 208. 

 Fishing nets, II. 189. 

 Fissure in the moon, II. 



346. 

 Fits of light, II. 616. 

 Fixed air, II. 513. 

 Fixed ecliptic, I. 503,P1.32. 

 Fixed fire, II. 405. 

 Fixed instruments, II. 352, 

 Fixedness, 11,396. 

 Fixed plane, If. 141. 

 Fixed stars, I. 187, PI. 36, 



37,11. 325. 



Fixing instruments, II. 354. 

 Flageolet, I. 402. 

 Flails, II. 215. 

 Flakes of snow, 1. 444. 

 Flame, I. 16, II. 291, 383, 



419. 

 Flamsteed,I. 601, 604, II. 



324. B. 1646, D. 1719. 

 Flat, II. 570. 

 Flat arches, II. 176. 

 Flaws, II. 316. 

 Flax, I. 183, II. 185. 

 I'lax of New Zealand, II. 



185. 

 Fleecy hosiery, II. 187. 

 Flemish weavers, I. 244. 

 Fletcher, II. 144, l6l. 

 Fleurieu, II. 192. 

 Flexibility, II. 383. 

 Flexible bodies, 11. 138,267. 

 Flexible fibres, I. 180, II. 



184. 

 Flexible knives, II. 208. 

 Flexible roads, II. 181. 

 Flexible threads, II. 136, 



138. 

 Flexible vessfels, I. 269. 

 Flexure, 1. 135, 138, 145, 



147, 627, 629. 

 Flexure in cooling, II. 404. 

 Flexure of a bar, II. 48. 

 Flexure of a column, II. 46 



. . 48. 

 Flexure of columns, II. 173. 

 Flexure of columns and 



bars, I. Pi. 9. 

 Flexure of compound bars, 



II. 389. 

 Flight of birds, II. 256. 

 Flint glass, II. 381. 

 Flints, II. 263, 498. 

 Floatboards, II. 23C. 

 Flo.iting balls, II. 382. 

 Floating boats, II. 243. 

 Floating bodies, I. 266,624, 



PI. 19, 11. 59, 220, 656. 

 Floating bridge, II, 242. 



Float regulator, II, 245. 



Floodgates, 1. 313, PI, 21. 



Floor, I. 143. 



Floor paper, II. 190. 



Floors, II. 178. 



Flour, II. 215. 



Flower, I. 726, II. 512. 



Flue, II. 410. 



Fluents, II. 120. 



Fluid, I. 259. 



Fluidity, II. 381, 383, 396. 



Fluidity of sand, II. 220, 



232. 

 Fluidity of sand and earth, 



11. 173. 

 Fluids, I. 257, II. 227,405. 



Motions of fluids, II. 57. 

 Fluoric acid, I. 120. 

 Fluor spar, I. 486. 

 Flute, I. 402, U. 267, 567. 

 Flute pipe, 1. PI. 26. 

 Flute player, II. 184. 

 Flutes, II. 275. 

 Fluxion of an arc, II. 16. 

 Fluxion of an area, II. 22. 

 Fluxion of a solid, II. 20. 

 Fluxions, 1. 249, II. 7, 119, 



124. 

 Fly, 1. 131. 

 Fly wheels, I. 179, II. 165, 



182. 

 Flying, 11. 164. 

 Focal distance, II. 315. 

 Foci, II. 281. 

 Focus, I. 414, 111 71, 283. 

 Focus of a lens, I. 417,11. 



281. 

 Focus of an ellipsis, II. 23. 

 Focus of a sphere of vari- 

 able density, II. 82. 

 Focus of telescopes, II, 287. 

 Focus of the eye, I. 450! 

 Fog, II. 474, 476. 

 Folding, II. 188. 

 Folkes, II. 152. 

 Fpmalhant, I. 497, 

 Fondeur, 1. 190. 



