438. INDEX. 



Sbroet&rs remarks on the planet Venus, page 59. 



Siberia, a new metal found in the red lead of, 279, 361. 



Snuff, veffel6 employed in Portugal for moiftening, 376. 



Socoloff's method to deftroy worms and infects, 169. 



Solar and Lunar period of 6co years, on the, 23. 



Song, tranflation of an African one, 236. 



Sounds, experiments to produce by different gafes, 332. 



Soy, methods employed in Japan and China to prepare, 342. 



Spain, method employed in, for making alcarrazas, 371. 



Spallanzani's experiments on bats, 134. 



SpeBre of the broken, obfervations on the, 232. 



Sponges, on the irritability of, 34. 



Stars, on their number and pofitions, 6r. 



Steam, on the expanfive force of, 345. 



Steam engine, account of Mr. Cartwright's patent one, 1. 



Steel and iron, obfervations on, 46. 



Strength of men and animals, an inftrument to meafure the, 399. 



Structure of cryjlals, theory of the, 35, 153, 287, 376. 



Subjlitute for oil paint, to prepare a cheap one, 22. 



Sugar maple, an account of the, 182, 322. 



Sun, on the fpots of the, 19. 



Swallow, defcription of the Javanefe, 118. 



Sympathetic ink, from nitrite of zinc, 175. 



Tanning, obfervations on the epidermis applied to, 409. 

 Telegraph, on the invention of the, 3 1 2. 



defcription of Dr. Hooke's, 314. . 



Tele/cope, account of the large one at Kiel, 113. 



Tejl liquors for detecting acids and alkalis, 180. 



Tiylerianfoeiety, prize queftion by the, 103. 



Theory of the fruelure of cryjlals, 3^-, 153,287, 376. 



Thornton, Dr. on a fruit half orange half nectarine, 423. 



Time pieces, on the irregularities in their rate of going, occafioned 



by magnetifm, 16. 

 Traitors, metallic, their influence, 250. 

 Tunnel, propofed to be carried under the Thames from Gravefend to 



Tilbury, 223. 

 Turkey or Adrianople red, oriental procefs for dyeing, 4, 126. 

 . effects of mordants in the procefs, 274. 



Vaquclins analysis of the emerald of Peru, 204. 



1 on the new metal called chrome, 279, 361. 



I'arley, Mr. on the influence of magnetifm on time pieces, 16. 

 Vegetation, influence ot light on, 64. 



influence of oxygen gas on, 109, 224. 



Venus, Shroeter's obfervations on, 59. 



Violet dye, which refifts oxygen, acids, and alkalis, $6. 



Voyages and travels — Van Braam in China, 85. Cit. Olivier in 



Perfia, Sec. 108. Mr. Brown in Abyihnia and Egypt, 108. 



Mr. Horneman in Africa, 108. Mr. Park in Africa, 235. 



Cit. Baudin in America, in." 



Watit, 



