INDEX. 13 



Quicklime, experiments relative to the weight it acquires by exposure to the 

 air, V, 12. 



R 



Rhododendron, poisonous effects of several species of, V, 63. 

 Roofs, how constructed in India, VI, 380. 

 Rosebay. See Oleander. 



Sagittarius, occultation of o in, VI, 160. 



Sailing. See Nautical chart. 



Sails. See Wind-mill. 



Saltpetre, method of making it in Kentucky, VI, 239— how obtained in 

 Spain, 243. 



Satellites, vide Jupiter. 



Sea-xuater, wherefore unfit for washing clothes, V, 144. — how to be render- 

 ed fit for washing, 146. 



Septic acid, in sea- water, V, 141. 



Servers of cities, description of a stopper for them, V, 148. 



Shoals, account of some newly discovered in the Indian seas, VI, 87. 



Signs, on the language of, used by some North American Indians, VI, 1. 



Silex, contained in meteoric stones, VI, 339. 



Silliman, Benj. Professor of Chemistry in Yale College, Conn, his and Mr. 

 Kingsley's memoir on the origin and composition of the meteoric stones 

 which fell from the atmosphere at Weston, state of Connecticut, &c. 

 VI, 323. — his chemical examination of the stones, 335. 



Soda, contained in sea-water, V, 141 is the basis of all hard soap, 145. 



Soil, alluvial, of the state of Maryland, VI, 319. 



primitive, of the state of Maryland, VI, 321. 



Spanish America, boundary line between it and the United States, measu- 

 red by A. Ellicott, V, 203. 



Sphex, on two species of, inhabiting Virginia and Pennsylvania, VI, 73. 



Spirit of nitre. See Nitre. 



Stars, shooting, account of, VI, 28. 



Steam-engine, report on the improvements made in their construction in 

 America, VI, 89. 



Stopper, description of one for drains, in the sewers of cities, V, 148. 



Strickland, William, his paper on the use of the thermometer in navigation, 

 V, 90. 5 



Strontites, account of the fusion of, VI, 99. 



Sugar, on the process of claying, VI, 82 — on the cultivation of, in Loui- 

 siana, 181. 



Sulphur, produced by heating water impregnated with vitriolic acid air, V, 

 8. — contained in meteoric stones, VI, 339. 



Sun, diameter of, VI, 216, 232. 

 eclipse of. See Eclipse. 



Swallows, on the hybernation of, VI, 59. 



