73or 



INDEX. 



Speculum, II. 282. 



Speculum metal, II. 283. 



Speculum musicutn, II.S72. 



Speech, II. 275. 



Speed, II. 480. 



Speer, II. 232. 



Speer's hydrometer, II. 

 890. ' 



Spencer, II. 244. 



Sphere, I. 117, 11. 17,21^ 

 123, 229, 339, 876. At- 

 traction ofasphere,n.45. 



Sphere charged with elec- 

 tricity, I. 6G2. 



Sphere covered by a fluid, 

 II. 220. 



Sphere of paper, 11. 376. 



Spheres, I. 515, II. 209. 



Spheres connected, I. 662. 



Spherical motion, II. 138. 



Spherical segments, II. 

 28fcl,313. 



Spherical surfaces, II. 71, 

 120. 



Spherical triangles, II. 135. 



Spherical trigonometry, II. 

 119. 



Spherical vortex, II. 226. 



Sphericity, II. 342. 



Spheroid, I. 577. 



Spheroidal navigation, II. 

 371. 



Spheroidal trigonometry, 

 II. 119, 359. 

 . Spheroids, II. 138, 359,359. 



Spherometer, II. 284. 



Spica Virginis, I. 497. 



Spiders, II. 184. 



Spider's thread, I. 134. 



Spider's web, I. 141, II. 

 352, 378. 



Spiija, II. 323. 



Spinet, I. 398. 



Spinners, II. 218. 



Spinning, 1. 181,11.185,186. 



Spinning {uachine, II. 

 186. 



Spinning wheel, I. 244, II. 



186, 218. 

 Spiral, II. 122. 

 Spiral compasses, II. 144. 

 Spiral mill, II. 236. 

 Spiral of Archimedes, II. 



562. 

 Spiral orbit, II. 32. 

 Spiral pipe, II. 238. 

 Spiral pipes, I. 328. 

 Spiral pump, I. 329, PI. 22, 



II. 248. 

 Spiral spring, II. 139. 

 Spiral vibrations of rods, 



II. 269. 

 Spirit, I. 716. 

 Spirit level, I. 310, PI. 



21. 

 Spirit levels, II. S53. 

 Spirit of wine, I. 372, II. 



382. 

 Spirit thermometer, I. 647, 



II. 390. 

 Spiritual substances, I. 

 ,610. 

 Spirituous liquors, II. 510. 

 Splitting hides, II. 208. 

 Sponge, I. 625. 

 Spontaneous combustions, 



II. 385. 

 Spontaneous electricity, II. 



435. 

 Spontaneous light, II. 291. 

 Spoon for earth, II. 216. 

 Spoon wheels, II. 236. 

 Spots of the sun, I. 501, PI. 



31, 11. 331. 

 Spoules, II. 186. 

 Spout, II. 487. 

 Spouting fluids, II. 222, 



223. 

 Sprat, II. 107. 

 Spring, I. PI. 2,10,11. 139, 



217, 377. 

 Spring of a coach, I. 148. 

 Spring of the air, II. 220, 



353. 



Springs, I. 179, S17, II. 



131, 168, 182, 19.1, 203, 



245, 383. 

 Springs of water, I. 286, 



PI. 20, II. 451, 452, 



479. 

 Spring steelyard, 1. 127, PI. 



9, II. 160. 

 Spring temper, II. 403. 

 Spring tides, I. 577, 585. 

 Spur wheel, I. 177, PI. 



15. 

 Square, II. 13. 

 Square of the velocity, II. 



140. 

 Squares, I. 102. 

 Squinting, 11.315. 

 Stability of a balance, I. 



PI. 8. 

 Stability of a wedge, I. 



155. 

 Stabihty of equilibrium, I. 



62,261, PI. 3,11. 40. 

 Stability of floating bodies, 



I. 267, PI. 19, II. 59. 

 Stability of fluids, I. PI. 



19. 

 Stability of ships, I. 326, 



II. 240. 

 Stables, II. 174. 

 Stacada, I. 401. 

 Stadium, I. 593, II. 152. 

 Stahl,I. 751,756. B. 1660, 



D. 1734. 

 Staiolo, n. 154. 

 Staircase, II. 174. 

 Stairs, II. 165. 

 Stalkart,II. 240. 

 Stampers, II. 184, 190, 



205. 

 Stamping, I. 224. 

 Standard measures, L 107, 



II. 146. 

 Standard pendulum, II. 



147. 

 Standard weights, I. 124, 



II. 160. 



Stanhope, I. 67, 329,658, 



664. SeeMahon. 

 Staple, II. 179. 

 Star Lyra, I. PI. 31. 

 Stars, I. 487, PI. 36, 37, II. 



325, 342, 355, 680. 



Eflect of the stars on 



light, II. 303. 

 Stars visible in London, 11. 



327. 

 Statical baroscopes, I. PI. 



19, IL 220,461. 

 Statical engine, II.' 237. 

 Statical lamp, II. 245. 

 Statics, I. 93, 123, II. 159. 

 Statics of fluids, I. 308. 

 Statics of semifluids, 11. 



220. 

 Stationary planets, I. PI. 



34. 

 Station pointer,JI. 145. 

 Statique, II. 129. 

 Stattler, II. 127. 

 Statuary's compass, I. PI. 7. 

 Stay, II. 181. 

 Steam, I. 271,619, IL 200, 



386, 394, 397, 404, 464, 



509, 519. Warming by 



steam, II. 410. 

 Steam air pump, II, 259. 

 Steam boat, I. PI. 29, II. 



243, 259. 

 Steam engine, I. 48, 133, 



.346, 361, 362, PI. 24, IL 



133, 165, 167, 257, 



263. 

 Steam regulator, II. 258. 

 Steam thermoraeter,II.389. 

 Steam tubes, II. 246. 

 Steatite, IL 157. 

 Steel, I, 227, 685, II. 86, 



169, 207, 403, 438, 509. 

 Steele, II. 273. 

 Steelyards, I. 126, PI. 8, 9, 



II. 160. 

 Steelyard with a crane, I. 



210, 



