GENERAL INDEX. 



427 



Sugar, Melsens's process for the manu- 

 facture of, 166 

 new species of, 187 

 " new test for the detection of, 



in certain liquids, 137 



" Scoffern's improvements in re- 

 fining, 1S6 

 Sulphuret of nickel in New York. 293 

 Sunlight, influence of, over the action of 



dry gases on organic colors, 215 



Surface, lunar, and its relation to that 



of the earth, 233 



" of the earth, periods of vegeta- 

 tion occupying, 317 

 Surveying instrument, 147 

 Suspension bridge at Nashville, 4 

 System. Taconic, 2-39 

 Table of the distribution of the simple 



bodies in nature, 169 



Taconic system, 259 



TALBOT AND MALONE, 151 



Tank locomotive, 16 



Tanning, new process for, 86 



Telegraph, effects of atmospheric elec- 

 tricity upon the wires of, 117 

 electro-chemical, 113 



electro-thermic, 119 



magneto-electric, 119 



submarine, between Eng- 

 land and France, 121 

 Telegraphic apparatus, Siemens's, 120 

 manipulator, 119 

 Telescope, improved, 14 1 

 marine, 143 

 Temperature of children, 353 

 of the ocean, 264 

 Tenacity of metals, 97 

 TESCHEMACHER, J. T., 297, 29S, 315 

 Test for cod-liver oil, 213 

 for lubricating compounds, 103 

 for the nitrates, 219 

 for quinine, 219 

 new. for iodine, 185 

 " new, for the detection of sugar in 



certain liquids, 137 



Theories of light, 137 



Theory of complementary colors, 137 



of the spleen, 349 



Thibet, observations in, 330 



Thermometers, Fahrenheit and Centi- 

 grade, comparison of, 153 

 Thermometric scale, new, 152 

 THOMAS, W. S., 119 

 THOMPSON, JAMES, 156 

 THORNEYCROFT, MR., 17 

 Tidal phenomena. 263 

 Tide-eauge, self-registerin?, 61 

 Tides of the Guif of Mexico, 162 

 Timber, process for the preservation of, 86 

 Tin in Vermont, 293 

 Titanium, 173 

 Transmissibility of heat, 141 

 Transparency of the ocean, 264 

 Transparent cement, 74 

 Transplanting evergreens, 320 

 Trap, effluvia, 67 

 "' 'nit, 67 

 Tree, gamboge, 320 

 " Upas, 322 

 Tubes, boiler, 7 



Tunnelling the Alps, 101 



Turtles, fossil, 311 



TVNDALL AND KNOBLAUCH, 135 



TYSON. T. P., 294, 295, 306 



ULLGREN, M,, 172 



Uaited States, change of level in the 



coast of, 251 



foraminifera? of, 323 



Uranium, new method of determining, 



in its ores, 179 



Urine, lest for the detection of sugar 



in, 187 



Upas tree, 322 



USHER, JAMES, 37 



Valley of the Nile, climate of, 379 



Valve, safety, 7, 8 



Variation of the magnetic forces, 132 



Variety, new, of cotton, 319 



" ofsugar-cane, 319 



Vegetables, exudation of ice from the 



stems of, 157 



Vegetation, alpine and arctic, analogy 



between, 317 



influence of nitrogen upon, 207 

 influence of salt on, 191 



successive periods of, occu- 

 pying the surface of the 

 earth, 317 



Velocity of electricity, 126 



Veneering, improvements in, 54 



Vermillio"h, adulteration of, 210 



Vermont, tin in. 293 



Ventilating vessels, improvements in, 62 

 Vessels, iron, effect of shot and shells 



on, 94 



new mode of applying steam 



to the propulsion of, 12 



new route for, to the equator, 384 



Vesuvius, eruption of, 279 



VlOLETTE, M., 77 



Vitriol, purification of oil of, from nitric 



acid, 219 



VOREL, M., 219 



Volatilization of bodies, 170 



Volcanic phenomena of Central Amer- 

 ica, 2SO 

 VOLCKER, DR., 191 

 Voltaic arc, 113 



" peculiar form produced in 

 the diamond under the influence of, 172 

 Volume, condensation of, in highly 



hydrated minerals, 224 



WALSH, LIEUT. J. C., 264 



WALTER. LIEUT., 95 



WARD. W. S., 53 



WARREN, DR. J. C., 312, 357, 363 



Water and organic matter, action of 



porous strata on, 223 



Cochituate, mode of conveying 



beneath a navigable stream, 58 

 effect of. on polarized light, 140 

 11 effect of pressure in lowering 



the freezing point of, 156 



freezing, certain conditions of, 221 

 " gas from, 83,233 



gaseous transformation of, 241 



meter, 61 



" of the ocean, different chemical 

 conditions of, at the surface 

 and at the bottom, 225 



