405 INDEX. ( 
Steam boats, 377——Engine alternating, 90 
Steatile crystaliazed, 27 
Steel, John H. Doctr. on chrysobery], 37 
teel, 37 
Storm, remarkable, at Catskill, account of 125 
Strontiaa, sulphate of,—of Lake Erie and the Detroit river, noti- 
tices of, 279-——-80—-from Erie Analysis of, 324—in sulphate of 
Bar 27 
wtih Island of, description of, and its Geological structure, 
Survey, nego of the county of Rensselaer in the State of 
New 18 
Ris psroft, hunedne of, 309 
Talc foliated of Vermont, 54 
Tantalite of Haddam, 52 
Telegraph, ss ieee 314 
Ticonderoga, walls o 
Titanium, red oxid of, en 
Torry, John, Doct, on the plants of the North West, 56 
Tourmalin, bjack, Plain 5 
Trisection on the Curves a 343 
Lapin rains, 375 
yellow, oxide of 52—Massive, 187 
Use of phosphoric acid in Jaundice, 162 
ee ae a remedy for the plague, 196 
Vienna, 1 
Foes and volcanic substances, Dr. Cooper on, 205 
Ww. 
Ward’s alternating steam engine, 90 
Waters of Lake George, their transpareacy and purity, 46—causes 
Webb, Thomas H. Mr. on wages spar, 50—his notice of the mine- 
rals’ near Providence, 284 
ss J. W. rh we foreign patieet in mineralogy, 2 
d the ancient arts—243—his SS 
of the Ilan of “a st ‘Michael ne its geological structure, 251 
a Weaning, seldche al the valley of, 4 
= Z. 
Leal for science, 388 
Loiste, 276 
+ 
in 
ee 
