INDEX. 



423 



PAGE 



Pyramid, the Great, why and when 

 'built, 185 



Quinic acid existing in common 

 plants, 



Radicals, organo-metallic, 194 



Rags, blue, bleaching of, 215 



Railway rails, continuous, 30 



" wear of, 31 



Railways, gauge of, 29 



Rain-marks, fossil, 314 



Rattlesnake, poison apparatus of. 368 

 Respiration, inquiries into the phe- 

 nomena of, 246 

 Retina, impressions on, 150 

 RODMAN'S new plan of casting can- 

 non, 50 

 ROGERS, Prof. W. B., on some phe- 

 nomena of vision, 150 

 ROOD, Prof., on the circulation of 



the eye, 149 



Ruffles^ machine for making, 81 



Rust spots, removal of, 216 



Sahara, desert of, 274 



Science, influence of, on calico-print- 

 ing, 71 

 recent applications of, to 

 military purposes, 53 

 Scotland, pleistocene history of, 

 Sea-bottom, action of waves on, 172 

 Sea-water, absorption of light by, 149 

 Sediments, observations on the accu- 

 mulation and deposition of. 302 

 Seeds, influence of extreme cold on, 352 

 Sewage, cost of purifying, 235 

 Sewing-machines, statistics of, 80 ( 

 Shades, glass, absorption of light by, 148 . 

 Shells, coloring-matter of certain 



fresh-water varieties, 377 



Ships, construction of, 24 



" iron-plated, 23 



Shoe, why it pinches. 

 Silica, varying conditions of, 279 



" soluble, industrial applications 

 of, 266 



Silver, curious action of, 224 



recovery of from plated-ware, 89 

 Silvering organic and metallic sub- 

 stances, 211 

 Simoon, observations on, 409 

 Skate, embryology of the, 354 

 Skin, effects of carbonic acid on, 250 

 Smells, noxious, effects, 

 Soaps, improvements in, 

 Sorghum, new dye from, 224 

 Sound, figures produced by, 183 

 " intensification of, 182 

 velocity of, 184 

 vibrations of, registering, 183 

 South pole, probable climate of the, 11 

 Specific gravity, new methods of de- 

 termining, 173 

 Species, extinction of, in geological 



time, 296 



Spices, soluble, preparation of, 

 Springs, hot, 281 



Star catalogues, 



Stars, double, 5 



" shooting, registration of, by 

 photography, 154 



PAGE 



Starch, improvement in manufactur- 

 ing, 84 

 in the atmosphere, 332 

 Statistics of consumption, 376 

 of suicide, 376 

 vital, 37G 

 Steam, density and temperature, 



new experiments on, 62 



use of, expansively, 166 



Steam-engines, Barton's improve- 

 ments in, 26 

 Steamboat speed, greatest on record, 24 

 Steel, tungsten, 198 

 Steel-works at Essen, Germany, 197 

 Stereoscopes, panoramic, 357 

 Stinks, philosophy of, 225 

 Stones, large, how raised by the 



ancients, 177 



Stone-age of man, 322 



Stone-digging machine, 92 



STORER'S experiments on the absorp- 

 tion of light by glass shades, 148 

 Storms, of dust, 409 

 Strychnia, antidote for, 367 

 Sugar, a remedy for the effects of 



drunkenness, 272 



antiseptic qualities of, 236 



conversion into alcohol, 252 



Suicide, statistics of, 376 



Sulphur, bleaching by, 214 



use of, as a dentifrice, 225 



Sulphuric acid, new process for 



manufacturing, 222 



Sun, observations on, 6, 385. 392 



Sun's light and heat, 158 



tl rays, measurement of the 

 chemical action of, 158 



Sun-signals, for travellers, 160 



Switzerland. aboriginal inhabitants of. 329 

 Systems, geological, lines of separa- 

 tion between, 296 



Taconic system, new views respect- 

 ing, 342 

 Tape-worm, nature of the, 359 

 Tartaric acid, artificial, 251 

 Telegraph, atmospheric, 65 

 electric light, 111 

 Telegraphs, submarine, new, 127 

 Telegraphic apparatus, new, 130 

 Telegraphing, submarine, present 



condition of, 126 



Tertiary climate of North America, 350 

 Thermometer, Lewis's self-register- 

 ing, 164 

 metallic, 165 

 sea-deep, 166 

 Tides in the American lakes, 167 

 Tin ore in California, 304 

 Titanium, influence of, on the quality 



of iron, 199 



Torpedo, electrical action of, 113 



Trap-dikes, formation of, 285 



Trees, curious mineral substances 



found in, 170 



Trias, new mammalian fossils from, 302 

 Triassic drift, 301 



Tungsten, influence of, on steel, 198 



Typography, chromo, 185 



Unionidae in the United States, 379 



Uric acid, use of, in calico-printing, 73 



