408 INDEX. 



Temperature, mean, at Salem ('Mass.) and at Rome, (Italy.) 386 



Test, for Platinum, 376 



Thermometers notice of, 371 



Ticonderoga, Plumbago of, 178 



Titanium, red oxide of — Silico-calcareous oxide of, 23C 



Tonsil, concretion from the, 164 



Torrey, John Doct. on a new species of Usnea, 104 



Tully, Doct. on Datura, 254 



Tungsten, yellow oxide of, 235 



Turquois and Lazulite, 382 



Translation on natural history, 382 



Travels in America, 380 



U. 



Unio on the genus, 258 

 Universe on the formation of, 128 

 Usnea of Dr. Torrey, 104 



Vaux, Geo. Mr. on iron conduit pipes, 173 



Velocity of sound. 394 



Verd antique, 38 



Vesuvius, 385 



Vindication of Mr. Seybert's claim to the discovery of fluoric 

 acid in the condrodite, 356 



Van Rensselaer, J. W. Doct. his notice of fresh water forma- 

 tions, 381 



W. 



Waterworks of Philadelphia, notice of, 375 

 Webster, J. W. Doct. his communication of Doct. Boue's noti- 

 ces of European Geology, 188 

 West or lost Greenland, 382 



Winslow, Miron, Rev. his letter on the minerals of Ceylon, 192 

 Wire drawing, 393 



Zeolite, 224 



Zircon, 29 



Zodiac of Denderah, 200 



