Index. 



491 



Slip of screw propeller, 426. 



Snails, 19. 



Snail's land, 164. 



Soiree of the Royal Microscopic Society, 

 316. 



Solar diameter, 437. 



Solar eclipse, 240. 



Solar eclipse, shadows during, 237. 



Solar phenomena, 430. 



Solar physics, 157. 



Soldering jewelry among the ancients, 4. 



Song of birds, 417. 



Sonorous vibrations a means of mea- 

 suring minute portions of time, 311. 



South Foreland lighthouse, 328. 



Sparrows' nests, 419. 



Spectrum of Mars, 319. 



Spectacles, hints on, 234. 



Spirula, 28. 



Sponges, 84. 



Spontaneous generation experiment, 80. 



Spots on the sun resembling a human 

 skeleton, 436. 



Spurious disc of star3, 463. 



Sprengel's mercurial exhauster, 453. 



Stability of gun cotton, 399. 



Staining of wood, 231. 



Standards of weight of the Royal 

 Mint, 15. 



Star chamber, its practice and pro- 

 cedure, 95. 



Steel engraving, 396. 



Stellar clusters, noticeable features, 463. 



Step for shafting, 227. 



Stereochromy, 409. 



St. Hilary church, 153. 



Stiperstone range, 188, 348. 



Strozzi collection from Rome, 401. 



Structure of hyalonema, 86. 



Sulphuret of carbon to the preparation 

 of perfumes, 312. 



Summer of 1783, 127. 



Sun's rotation, 159. 



Sun screen, 319. 



Sun-viewing and drawing, 429. 



Swallow's nests, 416. 



Swallow's wings, 376. 



Swatara coal district, 36. 



Swedenborg's biography, 300. 



Susquehannah coal district, 38. 



Syringings of phosphate liquor and 

 baryta-water, 412. 



Tadpole, organs of, 239. 



Tanning principle, 310. 



Telegraphic communication by means of 



numerical code, 40. 

 Telegraphic letters, 41. 

 Teleology of form, 29. 

 Telerpeton Elginense, new specimen, 



159. 

 Tellina solidula, 18. 



Telescopes, new, with silvered glass 

 specula, 234. 



Telescopes, separating power of, 400. 



Telescopes, silvered mirror, 176. 



Telescopic meteors, 145. 



Tempel's comet and shooting-star, 159. 



Temperate antarctic zone low baro- 

 meter, 334. 



Temperature, mean annual, 114. 



Tents of the Arabs, 414. 



Terebratula, 26. 



Termites, Indian insects, 112. 



Textile fibres, 313. 



Three-toed woodpecker, 326. 



Titmouse's nest, 416. 



Tonka bean, 256. 



Toreda, 18. 



Torricellian vacuum, 452. 



Toucani cluster, 464. 



Tour de Corduan, 326. 



Tracy park, Roman villa, 224. 



Trade winds, 335. 



Transmission of light, 142. 



Transparency of red-hot iron, 400. 



Tremadoc slates, 349. 



Treveneage cave, 74, 153, 223. 



Trial of the pyx, 10. 



Trials by Star Chamber, 104. 



Trial by jury, 104. 



Triton, 19. 



Trophosome, 286. 



Tumuli in Yorkshire wolds, 393. 



Twin records of creation, or Geology 

 and Genesis, 233. 



Tyrian purple, 166. 



Vaginicola aquatica valvata, 206. 



Vaginicola, valved fresh water, 205. 



Vaginicola valvata, 320. 



Variation of species, 319. 



Various modes of propelling vessels, 



421. 

 Vegetable feeders, 24. 

 Vegetable fibre dissolved, 476. 

 Vegetable monstrosities and races, 446. 

 Vegetable sheep of New Zealand, 128. 

 Venus's comb, 20. 

 Vicat Cole's marine painting, 364. 

 Vindomis of Antonine itinerary, 470. 

 Vindomis, Roman remains, 470. 

 Volcanic action, product of, 218. 

 Volutes, 23. 



Waldheimia Australis, 26. 



Wall decorations, never drying, 411. 



"Water glass, 411. 



Water glass fresco, 409. 



Water supply to ancient towns, 257. 



Waterproof cement, 315. 



Watering-pot, shell, 18. 



Waterwitch, experiments, 428. 



Weakness of wheat stems, 479- 



