406 INDEX, 
Natural History, exchange of the objects of, 400 
‘¢ Naturalist’s Guide” by Wm. Swainson, 183 
New-York Lyceum of Natural History, 192 
State Horticultural Society, 398 
Nitric acid with sulphuretted hydrogen, 375 
Northrop, B. F. discovers a fluid in hornstone, 283 
Observations on the Comet of 1823-—24, 315 
Olmsted, Prof. on illuminating gas from Cotton Seed, 294 
ee on the excessive use of Sulphur, 394 
Opium, English, 389 
Organic Remains of the Canadas, 60 
Palms, Chevalier de Martius on the, 383 
Parkes’ Essays, notice of, 190 
Patten, J. H. his new Air-Pump, 143, 275 
Percival, Dr. J. G. on the Geology and Mineralogy of Sicily, 20% 
—on the Zoological characters of Formations, 
213 ; 
Petalite, found in Canada, 69 
Philadelphia Water Works, 193 
— Academy of Natural Sciences, 399 
Phillips and Conybeare, their geological arrangement, 261 
Picture, Col. Trumbuil’s of the Declaration of Independence, 168 
Pierce, J. excursion to the White Mountains, 172 
Pimelite, 234 
Plants of Easton, Penn. 267 
Platinum, Dana, on the Ignition of, 198 
' Polishing of Granite, 185 
Population of Paris, 376 
Porter, Jacob, localities of Minerals, 233 
Potash, crystallization of the sub-carbonate of, 181 
Potassium and Sodium, preparation of, 372 
Powder of Balda, 204 
Precession of the Equinoxes, 132, 139 
Quinby on Crank Motion, reply to, 279 
Reliquiae Diluvianae, Review of, 150, 317 
Remarks on Prof. Wallace’s new Algebraic Series, 131 
—— on the paper on the Precession of the Equinoxes, 132 
— on Prof. Fisher’s paper on the Maxima and Minima of 
Functions, 133 
Renwick, Prof. description of a new Mineral, 192 
Review of Prof. Buckland’s Reliquiae Dilnyianae, 150, 317 
Revue Encyclopedique, 385 
