

i-\i>EX, 415 



Lea, Isaac, Mr. his notice on a sing^ular impression in sand stone, 155 



Letters, extract of one from General E. Hoyt, 125 — original, from Doctor 

 Franklin, 157 — extracts, from William Maclure, Esq. 197 — of Mr. School- 

 craft, to lion, Thomas Centon, 223 — of Mr. Benton, in reply, 230— of Prof. 

 Griscom,on the Calorimotor and Defia^rator,364— of Mr. Seybert, on the • 



condrodite, 366 



Libraries, circulating, 175 — of St. Petersbur^h, 177 



Linnean Society, at Paris, 382 



Lithography, 170 and 386 



Localities, miscellaneous of minerals, 39 and 254 



Lon^^tuJe of New-York, 143 



Lunar volcanoes, 176 



M. 



Maclureite, analysis of, 336 



Maclure, William, Esq. his minerals for the Geological Society, 270 



Maestricht school, for mutual instruction in, 386 

 Magnetism, 190— anhnal, Szc, 192 

 Magnetic effects of the Calorimotor, 357 



Maa;netism, electro^ 388 — 391 — connexion between it and voltaic electri- 

 city, 392 



Magnesia, solubility of, 378 



Malbay, mineralogy and geology of, 205 

 Manganese, ore of, notice of, 249 

 Marseilles, mutual instruction in, 191 

 Mathematics, review of the Cambridge course of, 304 



Means of preserving eggs, 379 



Measurement of the meridian, 1 90 



Memoir on the natural walls of North Carolina, 1 



Merino sheep and wool, 189 



Meteorolites, 170 and 175 



Method of separating cobalt from other metals, 188 



Mica prismatic, 399 



Mineralogy of the Highlands, 27— in Bavaria, 193— of Hungary, 384 



Mhierals, Mr. Barnes's catalogue of, 8 — miscellaneous notices of, 39 — prices 

 of, in London, 169 — of Patterson and the Valley of Sparta, New-Jersey, 

 remarks on, 239 — miscellaneous localities of, 254 — descriptive catalogues 

 of, 257 and 265 



Mineral waters, 187 



Mineral, new, 193 



Mr. Lewis G. Schweinitz, on the genus viola, 48 



Mitchijl, Samuel, Doctor, on a group of polypes, 46 



Molybdena, sulphuret of, 401 



Monson, Alfred, Doctor, minerals from, 269 



N. 

 Naples, surgery in, 179 

 Necrology, 193 

 Nephrite, analysis of, 346 



New astral lamp, 386 

 New method of taking a fac simile, 186 

 New species of Salamander, 174 

 Nitrous oxide, singular effects of, 194 



Notice of Mr. Schoolcraft's memoir of a fossil tree, 23— miscellaneous in 

 Mineralogy and geology, 39 — of the revolving steam engine, 144 — of a sin- 



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