420 INDEX. 



s. 



Sabine, Capt. on the magnetism of the earth, 145 



Safety tubes, 345 Salts, number of, 184 



Sand formation of New Jersey, 274 Saturn's ring, eccentricity of, 162 



Scandinavians, early discovery of America by, 410 



Sea, on the color of, 170 Sea, temperature of, 295 



Seybert, Mr. analysis of meteorite by, 326 



Shepard, C, U. on ferro-silicate of manganese, 142 



on new localities of minerals, 144 



on native iron, 140 



• — mineralogical Journey by, 353 



Siberia, notices of, 24 Siamese twin brothers, 212 



Silk, culture of, 202 Smoke disperser, 164 



Sodium, 182 Solar phosphori, 170 



Solar rays, electricity of, 391 Spherical triffonometry, elements of, 415 



Springs, on the origin of, 336 Steel, manufacture of. 111 



Steel plate, colored, 375 Stereotyping, origin of, 161 



Strong, Prof, solution of a problem in Fluxions, 69, 329 



Sulphurous Acid, liquid, 166 



T. 



Tabular Spar, new locality of, 145 Technology, elements of, 198 



Temperature of the sea, 295 



Test for vegetable and animal matter, 182 



Thermometer, Register of, at Brooklyn, 409 



Thorium, a new metal, 381 Tin, crystallization of, 206 



Titaniferous iron ore, analysis of, 42 



Tobacco, chemical examination of, 369 Tomatos, acid in, 115 



Trap rocks, igneous origin of, 116 Turner's Chemistry, new edition of, 201 



U. 



Unit, linear, 164 United States, architecture in, 99, 249 



Urinary Calculi, 190 



V. 



Vermin, destruction of by steam, 390 



W. 



Warren, Dr. on the Siamese Boys, 212 Watkins' Galvanic Battery, 162 



Weather Glass, 187 Welther's Safety Tube, substitute for, 345 



Wheat, potatoe flour in, 173 Wollaston, Dr. death of, 159 



Wood, process for drying, 163 Wood, inhumed, 398 



Zircon, new locality of, in New York, 196 



• ■ in Vermont, 358 



Zoological Weather Glass, 187 



