404 INDEX. 



Larvae, Jer. Van Rensselaer on, 229 

 Light, Monochromatic, 190 

 Lightning rods, Prof. Hare on, 322 

 Localities of Minerals, by A. A. Hayes, 195 



M 



Magnetism, animal, 175 



Magnetism by solar rays, 171 



Marshall, C. H. Capt. on a temporary rudder, 371 



Mather, W. M. on the non conducting power uf water, 36S 



Meade, Wm. Dr. Analysis of Mineral Spring, &c. 145 



Analysis of Tioga Coal, 32 



Mesotype, locality of, 198 

 Meteoric Fire Balls, notice of, 35 

 Micrometical observations, 172 

 Minerals, cabinet of, for sale, 199 



exchange of, proposed, 199 



Mitchell, Prof, on the low country of North Carolina, 336 

 Mount Bolca, formation of, 255 

 Mule Silver, 200 

 Mutual Instruction, 173 

 Mystery, Mark Hopkins, on, 217 



N 



Natural History of Orange co. N. Y. data for, 224 

 North Carolina, Gold Mines of, 201 



on the low country of, 336 



Notice and Analysis of Prof. Daubeny's work upon active and 



extinct Volcanos, 235 

 Necrology, 1 66 

 Neuchatel, 182 



New Haven, Gymnasium at, 385 

 Nuttall, T. notice of his introduction to the study of Botany, 93 



O 



Ohio, Coal and diluvial strata of, 38 



people of, 200 



Olivine, analysis of, 184 



Opium, observations and experiments upon, 17 



Oxalates, experiments upon, 188 



Jf 



Piperine, experiments upon, 326 

 Perkins, Jacob, Esq. upon Steam Eng 



ines, 40 



