402 INDEX. 



Columbite, discovery of, in Massachusetts, 220 



Comets, observations of, 94 



Common salt crystals of, 377 



Commiin, J. Du, on his hypothesis of volcanos, 51 



Conchology of the United States, 378 



Congress of Savans, 386 • 



Cooper's rotative piston, 313 



CoDOsive sublimate, 399 



Crystallized salts, how preserved, 391 



Cyanic acid, 258 



Cyanogen and sulphur, 385 



perchloride of, 257 



D 

 Dearborn, H. A. S. Gen. on the North American lakes, IS 

 Diamonds, artificial, 394 



E 

 Eaton, Prof, on the number five, 172 



on alcohol from farinaceous plants, 173 



on argillite, 299 



Education, 209 



Electiicity of the tourmaline, 390 



Expeditions, polar, history of, 124 



F 

 Fenn on the manufacture of glass, 112 

 Fibrous gypsum, 377 



Field, M. Gen. meteorological remarks by, 288 

 Finch, J. on the boundaries of Empires, 99 

 Fish and Lizards in extraordinary circumstances, 41 

 Five, the favorite number in nature, 172 

 Fluxions, a discourse upon, 53 



solution of a problem in, 283 



Fraunhofer, life of, 304 



Fulminating powder, a new kind of, 397 



G 

 Gallic acid, new mode of obtaining, 395 

 Galvanic protection, by different metals, 263 



trough, new one, 215 



Geography, physical, effects of, 99 



Geology of the gold region in North Carolina, 1 



Glass, ancient, from Milo, 331 



on the manufactory of, 112 



Gold, medical uses of, 385 



mines of North Carolina, 360 



Goodrich, J. letters from, 345 

 Gorham, J. Dr. obituary of, 400 

 Gossamer spider, 399 

 Gout, use of Iodine in, 176 

 Griscom, Prof, translations by, 257 



H 

 Hare, R. Prof, new chemical instruments by, 293 

 Hassler's theodolite, 252 



F. R. plan for a survey of the coast of the United States by, 225 



Hayes, A. A. on alumine with pigments, 173 



• '- — on a scarlet pigment, 174 



Hydriodic acid, mode of preparing, 383 



High rock of Saratoga, 341 



Hiidreth, S. P. meteorological observations by, 44 



Hitchcock, Prof., discovery of tin in Massachusetts by, 188 



