INDEX 'TO VOL, VII. 
Adams, Prof. J. on the Construction of the Thermometer, 121 
-— locality of Amethyst, 199 
Air-Pamp, New, by J. H. Patten, 143—Prof. Dana’s remarks en 
the same, 275 
Akerly, Dr. S. on the Language of Signs, 348 
Alcohol, combined with Oil of Turpentine, 390 
Algebraical Series of Prof. Wallace, 131 
Alum of Sicily, 210 
Amethyst, localities of, 199, 229 
Analysis of some Chrysoberyls, 105 
— Sillimanite, 113 
—__-_—~ Siliceous Hydrate of Copper, 11¢ 
——-+——-~ Hydrate of Iron, 298 
——~ Melanite, 300 
Ancram Lead Mine, 247 
Annales des Sciences Naturales, 387 
Archives Génerales de Médecine, 388 
Asclépiade L’, 388 
Ashes, Pot and Pearl, 304 
Augite, 88 
Aurora Borealis in Faroe and Shetland, 392 
Batteries, Voltaic, of Prof. De Butts, 271 
Beryls of Haddam, forms of the, 395 
Bescke, C. H. Exchange of Objects of Nat. History, dsc. 400 
Bibliotheque Royale de Paris, 376 
Bigsby, Dr. J. on the Minerals and Organic Remains of the Can- 
adas, 60 
Biographical Notice of Haty, 362 
_ Blue, Prussian, 380 
Boston Forts, 338 
Bowen, G. T. on the the Colour of the Purple Cabbage, 112 
—-— description and analysis of the Sillimanite, 115 
a a en re Siliceous Hydrate of 
Copper from New-Jersey, 118 
: ~———— notice of Localities of Spodumene, 118 
Brongniart, Alex. sur les Caracteres Zoologiques des Formations, 
213 
Bruce, Dr. notice of the Malleable Iron of Louisiana, 219 
Vou. VIL, No 2. 51 
