724 



ITS'DEX. 



Ramsgate, II. 233. 



Ranby, U. 601. 



Range of a cannon ball, II. 



260. 

 Range of a projectile, I. 39, 



«86, II. 33. 

 Raper, II. 152. 

 Rarefaction, I. 632. 

 Rarefaction of air, II. 220, 



253. 

 Rarefied air, II. 265. 

 Rarity of the atmosphere, 



II. 60. 

 Ras, II: 155. 

 Raspe, II. 494, 496. 

 Rasping mill, II. 215. 

 Rats, II. 241. 

 Rattlesnake, II. 518. 

 Raven, II. 311. 

 Ravenna, I. 587. 

 Ray, I. 748, 756, II. 436, 



495. B. 1628, D. 1705. 

 Ray of light, I. 408, PI. 26, 



II. 70. 

 Razors, II. 208, 209. 

 Razor's edge, II. 389. 

 Razor straps, II. 210. 

 Reaction, I. 55, II. 379. 

 Reaction of water, II. 223. 

 Read, I. 714, II. 482. 

 Reaping, II. 218. 

 Reaping wheelbarrovir, II. 



209. 

 Reaumur, I. 632, 648, 748, 

 756,11.207,386,558,561. 

 B. 1683, D. 1757. 

 Reciprocal action, 1. 51, 55, 



56, II. 35. , 

 Reciprocal force, I. 613, 



Pl.'2, II. 37. 

 Reciprocals of numbers, II, 



4,5. 

 Reciprocals of primes, II. 



110. 

 Reciprocating springs, II. 



480. 

 Reckoning board, II. 143. 



Reckoning machines, II. 



146. 

 Reckoning rods, II. 146. 

 Recoil, II. 260. 

 Recoiling scaperaents, II. 



194. 

 Recorde, I. 473, II. 323. 

 Recovery of sight, II. 313. 

 Rectangle, II. 13. 

 Rectification of a curve, II. 



124. 

 Rectification of motion, I. 



174, PI. 14, II. 182. 

 Rectilinear motion, I. Pli 1. 

 Recueil de tables astrono- 



miques, 11.373. 

 Recueil de traitea sur 



I'electricit^, II. 415. 

 Recurrence of sensations, 



II. 563. 

 Redern, I. 480, II. 366. 

 Red heat, II. 322. 

 Red hot ball, 11. 262. 

 Red light, I. 465. 

 Red rays, II. 407. 

 Red sea, I. 587, II. 234, 367. 

 Reduction of angles, II. 



146. 

 Reduction of observations, 



II. 116, 147. 

 Reeds, II. 185, 1S8. 

 Reel, II. 186. 

 Reeling, 11. 186. 

 Rees, II. 127, 129. 

 References, I. 25. 

 Reflecting instrument, 11. 



282. 

 Reflecting instruments for 



angles, II. 350. 

 Reflecting lamps, II. 282, 



290. 

 Reflecting level, II. 353. 

 Reflecting microscope, 11. 



79. 

 Reflecting surface, I. 415. 

 \ Reflecting telescope, II. 

 383. 



Reflecting telescopes, I. 



429, 431,476. 

 Reflection, I. 81, 437, 460, 

 472,P1.5,26,n. 70, 136, 

 543, 584, 622. 

 Reflection at equal angles, 



II. 323. 

 Reflection of a stone, I. 



307. 

 Reflection of cold, I. 638. 

 Reflection of heat, II. 406, 



631. 

 Reflection of invisible heat, 



II. 283. 

 Reflection of light, I. 410, 



11.291,321. 

 Reflection of sound, I. 374, 



PI. 25. 

 Reflection of waves, I. 288, 



3(5. 

 Refracting mediums in mo- 

 tion, II. 294. 

 Refracting telescopes, II. 



286. 

 Refraction, I. 410, 411, 

 460, 472, 542, 566, PI. 

 26, 29, II. 70,287,320, 

 323, 354, 465, 509, 543, 

 623, 660. Double refrac- 

 tion. II. 309. 

 Refraction of balls, II. 



226. 

 Refraction of crystals, I. 



445. 

 Refraction of the atmo- 

 sphere, I. 441, II. 81. 

 Refractions, II. 472. 

 Refractio solis inoccidui,II. 



302. 

 Refractive densities, I. 412, 

 421, 473, PI. 27, II. 70, 

 509, 679. 

 Refractive force, II. 509. 

 Refractive powers, II. 282, 



294, 296. 

 Refractive powers of tjje 

 eye, II. 578, 604. 



Refrangibility, II. 282, 



320. 

 Refrangibility of heat, 1. 



638. 

 Refrangibility of light, J[l. 



286. 

 RetVigeralion, I. 698. 

 Regal organ pipe, I. 401, 



PI. 26. 

 Regemottc, II. 170. 

 Regenerated paper, II. 

 . 190. 

 Register,' II. 192. 

 Registered cordage, II . 



187. 

 Register for a mine,, 11.200. 

 Registers of rain, II. 476. 

 Regnault, II. 217. 

 Regnicr, II. 167. 

 Regression of heat, II. 405. 

 Regulation of descent, II, 



181. 

 Regulation of discharge, 



II. 245. 

 Regulation of force, I. 



96. 

 Regulation of hydraulic 



forces, I. 310. 

 Regulator, I. PI. 2, II. 182. 

 Regulator for a were, II. 



234. 

 Regulators of electricity, 



II. 434. 

 Regulus, I. 497. 

 Reil, II. 59f . 

 Reimarus, II. 482, 486, 



498. 

 Relative centre of refrac- 

 tion, II. 74. 

 Relative motion, I. PI. 1. 

 Relief, II. 157. 

 Remarks on lialos, II 306. 

 Remote tide, I. 579. 

 Removing earth, I. 219. 

 Removing ships, II. 243. 

 Removing weights, I. 203, 

 210, II. 200. 



