GENERAL INDEX. 



391 



Spectrum, prismatic, in the electric 



light, ]04 



Speed, extraordinary, 25 



Spiders, poison of, 333 



Spinning wool, new machine for, 51 



yarn, improved machinery for, 51 



Springs, chalybeate, arsenic in, 200 



Squier, Mr.. " 363 



St. John, J. II., 44 



Staite, Mr., 1U3 



Stamp, post-office, 55 



Stapelia and lotus, 2!tt 



Starch from horsechestnnts, ]t'3 



Stars, shootintr, observed in 1849, 33H 



Statue, new, discovered at Rome, 365 



Steam and water gage, 26 



" boilers, apparatus for feeding, 2-2 



" boiler-feeder, new, 'J2 



" carriages on common roads, 37 



" dissolving bones by, 97 



" engine, chloroform, 28 



" engines, invention for stopping, 24 



" frigate, new, English iron, 



" generator, 23 



" hoisting machine, 25 



" navigation, novelty in, 33 



" plough, 61 



" effects of, upon timber, 96 



Steamboat New World, 30 



Steamers, paddles of, 30 



Stearic and margaric acids, composition 



of, 216 



Stearine, 98 



Steel, invention for the manufacture of, 87 

 " manufacture of, 80 



Stephenson, Mr., 15, 81 



Stevens, Messrs., 33 



fitillman, A., 25 



Stod.lard. Prof., 90 



Stone-cutting machine, 49 



Stone, durability of, 274 



Stones, mode of coloring, artificially, 2J1 

 Stopping steam-engines, invention for, 24 

 Stoves, air-tight, explosions in, 193 



Strachey, Lieut., 250, 251 



Strength of differently-shaped tubes, 83 

 Structure, cancellated, of some of the 



bones of the human body, 326 

 " of coral animals, 311 



Strychnia, experiment with, 216 



Submarine telegraph between England 



and France, 128 



Substitute for frescos, 94 



for the potato, 299 



Subterranean map of Paris, 3t56 



Sugar-cane, saccharine, richness of, 305 



Sugar, new method of extracting, 166 



" origin of in the animal economy, 174 



" potato, 173 



" production of, in the urine by 



wounding the brain, 174 



Sulphate of soda, new mode of manu- 

 facturing, 210 

 Sun-dial, universal, 66 

 Survey, coast, and the magnetic tele- 

 graph, 124 

 of the coast of the U. S., prog- 

 ress of, 351 

 Surveying instrument, new, 43 

 Surveys, geological, of the IT. 8., 222 



Suspension bridge at Festh, 22 



novel, at Chester, 20 

 over the Ohio, 13 



proposed, over the 



Dnieper, 21 



" bridges, iron fur, HJ 



Su^quehanna, U. S. steamer, 34 



Swift, Capt. W. H., 74 



Switch, Tyler's safety, 40 



Switches, improved, 41 



System, nervous, of frogs, 329 



solar, connection of comets with 



the, 343 



Tftils, men with, 318 



Taylor, R. C., 2ii8 



Tea culture in the IT. S., 303 



" green, how colored, 301 



" gypsum and indigo in, 304 



Teeth, action of soap on, 320 



Telegraph, magnetic, and the coast sur- 

 vey, 124 

 new, 124 

 submarine, between England 



and France, 128 



Telegraphs under water, chain pipes for, 43 

 Telescopes, Norwegian water, 75 



Tempering edge-tools, improved mode of, 90 

 Terraces, river, of the Connecticut val ley, 23!) 

 Teschemacher, J. E., 262, 273 



Test, new, for albumen, 178 



" of the quality of indigo, 177 



Testing milk, mode of, 183 



Testaceous Mollusca of Jamaica, distri- 

 bution of the, 334 

 Texas, discovery of fossil footprints in, 280 

 Theory of the effect of tides, 242 

 Thermometer, water, 160 

 Thickness of paddles, 31 

 Thompson, Rev. Mr., 285 

 Thorel, M., 178 

 Tide?, influence of, on geological forma- 

 tions, 244 

 Tilghman, Mr., 210 

 Timber, effects of steam on, 96 

 Tingle, Mr., 32 

 Tomb of Napoleon, 365 

 Tools, edge, improved mode of tempering, 90 

 Towns, air and water of, 204 

 Trap-dikes, effects of, on magnesian 



limestone, 235 



Traveller, Boston, 367 



Treasures, botanical, of California, 301 



Tremblay, M. du, 28 



Tribune, New York, 368 



Tricks of fire-jugglers, explanation of the, 196 

 Trilobites of Bohemia, 284 



Troost, Prof, 264 



Tubes, comparative strength of different 



shapes of, 83 



Tyler's safety-switch, 40 



Type, copper, manufacture and use of, 59 

 L T nicorn, the, 320 



United States, fossil crinoids of, 282 



geological surveys of, 222 

 occurrence of rare min- 

 erals in, 273 

 " progress of the survey of 



the coast of, 351 



report on the light-hous- 

 es of, 71 



