408 INDEX. 



Review of Dr. MacCulloch on remitttent diseases, 338 



Revue Encyclopedique, 184 Rock crystal, substituted for glass, 191 



Rock specimens, for sale, 390 Rose quartz of Paris, 297 



s 



Salina, bromine in the brine of, 143 Sanford, Prof. E. on calcareous tufa, 359 



Scale of chemical equivalents, 184 Sea vrater phosphorescence of, 166, 187 



Sewer, cleansing of, 161 

 Shepard, C. U. on the Deweylite, 81 



mineralogical journey of, 126, 289 



Siliceous minerals, decomposition of, 404 

 Silk, culture of in the United States, 278 



manufacture of in United States, 382 



practical instructions concerning, 207 Snow, animalcules in, 56 



Society of arts, manufactures and commerce, 390 Southern agriculturalist, 203 



Specific gravities, a new instrument for, 263 Spectacles, use of mica in, 374 



Spider, manner of forming its web, 165 Springs, and fountains, artificial ones, 267 

 Staurotide of Mink Pond, 127 Statistics, 182 



Strong, Prof, on capillary attraction, 70 



solution of a problem in fluxions, 69 



Strontian as characterized by a red flame, 261 



Sulphates, decomposition of in water by organic matters, 147, 156 



Sulphuretted hydrogen, bad effects of, 160 



Sulphuric acid, action of on hydrocyanic acid, 146 



Swift, Dr. P. on the temperature of the sea, 191 Sympathetic ink, 148 



T. 



Talcose slate, containing the gold of Carolina, 50 



Tappan, Judge, on cannel coal of Ohio, 376 



Temperature of the atmosphere and plants, 167 Temperature of the sea, 191, 192 



Tennesse meteorite, 200, 378 Thomas, D. geological facts by, 375 



Thury, M. le Vicomte de, on artificial springs, and fountains, 267 



Tourmalines of Paris, (Me.) 295 Tourmalines, spontaneous electricity of, 301 



Transition rocks of the Cataraqui, 85 



u. 



United States, architecture in, 11, 212 United States, culture of silk in, 278 



manufacture of indigo in, 237 



University of New York, report to the regents of, 385 



V. 



Vauquelin's place in the Institute, 185 "Vegetable coloring materials in Canada, 186 

 Vegetables, the formations of acids in, 150 Vegetation of the Ottawa, 349 



Vegetation of an ancient world, 110 Ventilator, marine, a new one, 75 



Violet ray, magnetic influence of, 171 Voltaic pile, calorific effects of, 175 



w. 



Wadsworth, D. on the upper falls of the Genessee, 209 



Ward, S. on fresh water fountains, 379 Watch, a remarkable one, 180 



Water, heating of, 371 White mountain minerals, 290 



Whiting, S. on a new marine ventilator, 75 



Wilder, C. on rectification of the ellipse, 38 on resolution of equations, 276 



Wilson, Rev. Mr. on adjusting lightning rods, 361 



Wire gauze windows, a protection against aerial poisons, 370 



Witham, Henry, on the early vegetation of our globe, 110 



Wood, change of color in, 404 Wyoming, valley of, its geology, 308 



Wyoming, history of, 337 



X 



Xanthite, crystalline form of, 359 



