ANALYTICAL INDEX. 



45 



Schxibler's experiments on the influences of 

 Junar phases, i. 414; his observations of 

 the electricity of the air, ii. 154, 158. 



Science, predictions of, i. 171. 



Screens, effects of, i. 451. 



Screw, the, ii. 288. 



Screw, wedge, and inclined plane, ii. 283-294. 



Seasons, the, i. 490 ; seasons of the planets, 

 i. 58. 



Self-regulating feeders for a steam-boiler, ii. 

 504. 



Self-regulating damper, ii. 513. 



Sensations, ii. 19. 



Senses, fallacious indications of the, ii. 85. 



Sense of feeling, errors of, ii. 86. 



Seward's slides, ii. 479. 



Shadow of the earth, i. 80 ; of the moon, 

 i. 82. 



Sheet lightning, i. 539. 



Shooting stars and meteoric stones, i. 459- 

 474. 



Silent lightning, i. 545. 



Single-acting engine, ii. 428. 



Single cock, the, ii. 481. 



Single clack-valve, the, ii. 474. 



Siphon-gauge, the, ii. 49. 



Sirius, or the Dog-star, ii. 338. 



Sleet, luminous, ii. 82. 



Slide-valves, ii. 476. 



Smeaton's tackle, ii. 275. 



Smellins, deceptions of, ii. 95. 



Soap-bubbles, thickness of, ii. 24. 



Solar eclipse, i. 83. , 



Solar system, the, i. 53, 172; ii. 239; mo- 

 tion of, ii. 371. 



Solomon's temple supposed never to have 

 been struck with lightning, ii. 106. 



Sound and light, alliance between, i. 230. 



Sound cannot be transmitted in the absence 

 of air, ii. 56. 



Space beyond the limits of the solar system, 

 i. 585. 



Spanish bartons explained, ii. 277, 278. 



Specific heat, i. 332. 



Spectrum, the, how produced, i. 578. 



Speed of lightning, i. 541. 



Spheroidal form of the earth proved, i. 495- 

 498. 



Spheroid, oblate and prolate, ii. 224. 



Spica, ii. 338. 



Spontaneous change, matter incapable of, ii. 

 33. 



Spontaneous motion, ii. 36. 



Spots on the sun. i. 73. 



Spring tides, I. 215. 



Spur-wheels, ii. 262. 



Stars, immense distance of the, i. 589 ; dif- 

 ferent magnitudes or orders of stars, i. 

 590-592 ; relative brightness of, ii. 346 ; 

 double stars, ii. 351, 365,373; periodic 

 stars, ii. 358; temporary stars, ii. 360; 

 binary stars, ii. 365; the visible stars, i. 

 585-596; ii. 350. 



Statics and dynamics, ii. 243. 



Steam, elasticity of, ii. 306 ; compression of 

 steam without loss of heat, ii. 310; great 



power of steam, ii. 401 ; steam a common 

 property of all liquids, ii. 405 ; mechan- 

 ical force of steam, ii. 419; variation in 

 the consumption and production of steam, 

 ii. 512. 



Steam-boiler, ii. 496-513. 



Steam-engine, the (five lectures), ii. 399- 

 568 ; Watt's inventions and improvements 

 of the steam-engine, ii. 423-441 ; principle 

 of the steam-engine (see Ebullition), ii. 

 314. 



Steam-gauge, ii. 506. 



Steam-jacket, ii. 424. 



Steam-navigation, prospects of, i. 269-282 ; 

 art of, applied to ocean-voyages, i. 343. 



Steamship 



Steam space and water space in steam-boil- 

 er, ii. 501. 



Steam-vessels for national defence, i. 274. 



Steelyard, the, ii. 250. 



Stellar universe, the, ii. 357396. 



Stephenson ; s engines at Killingworth, ii. 533. 



Storm converted into a land-s-pout, i. 602. 



Storm-clouds, height of, i. 536. 



Straight wand, the, ii. 225. 



Straps or cords, ii. 258. 



Subterranean sources, inundations from, ii. 

 77. 



Suction by the mouth (the effects of) the 

 means of discovering atmospheric pres- 

 sure, i. 285. 



Suctiun-pipe, the, ii. 407. 



Sugar-refining, Howard's improvement in 

 the process of, ii. 170. 



Sulphureous odor developed by lightnin?, ii. 

 64. 



Sulzer's experiment in galvanism, i. 364. 



Sun, the, i. 67-76 ; magnitude of the sun, i. 

 69; its density, form, and rotation, i. 72; 

 central eclipse of the sun, i. 83 ; sun's in- 

 fluence at Venus and Mercury, i. 149; its 

 appearance at Mars, i. 355; it is the com- 

 mon centre of the planets, i. 172; sun's 

 influence on the tides, i. 214; combined 

 influence of the sun and moon, i. 216 ; the 

 sun's appearance as seen from Jupiter, i. 

 2-12; as seen from Saturn, i. 245,246; 

 calorific effects of the sun's rays, i. 490 ; 

 horizontal ; appearance of the sun and 

 moon, ii. 9 1 ; heat of the sun's rays, ii. 193. 



S'.m-and-planet wheels, ii. 447. 



Supporters of combustion and combustlDes. 

 ii! 323. 



Supposed rays of cold, i. 453. 



Surface of the planets, i. 61. 



Sword and belt of Orion, ii. 336. 



Symmer's theory of electricity, i. 135. 

 I Syringe, the exhausting, ii. 41 ; the con- 

 densing syringe, ii. 56. 



Systems of pulleys,, ii. 274. 



Table showing the te-np?ratJire at which 

 water wi! 1 . j.'l unce. ,Uficc ir.t press.ires 

 of the atmo.<pheie, ii. 3i 5 ; table exhibit- 

 ing tie me.i.aixical po*e' of water con- 



