INDEX. 



351 



Soils, capabilities of 202 



Solar parallax, determination of . . 128 

 " phenomena, recent observa- 

 tions on 322 



Soldiers, Federal, physique of . . . .301 



Solenhofen, fossil from 245 



Smoke-rings, formation of 145 



Sound, extraordinary transmission of 147 

 " phenomena of, Prof. Tyndall 



on 146 



" propagation of in air 147 



Species, origin of, Owen's views on . 285 



transmutation of,Agassiz on 288 



" transmutation of vegetable . 308 



Spectrum analysis and the stars . . 133 



new observations 



on 135 



most recent facts 



concerning . . . 131 

 " " practical applica- 

 tion of 136 



Speed and distance, estimation of . . 87 



Stars, nearest fixed 3-iO 



" parallax of minute 319 



" planetary systems among . . . 316 

 spectrum analysis applied to . 133 



" temperature of 134 



Steam-boiler explosions 21 



new investi- 

 gations on 85 



Steam, cultivation by 8 



Steel, chemistry of 178 



" produced by Bessemer's pro- 

 cess 178 



Steel-working, improvements in . . 24 

 Stomach, why does not digest itself . 202 



Stones, precious, cavities in 245 



odors of 245 



Storms, observations on 154 



Strata, succession of, thoughts on . . 242 

 Stratification, new veins respecting . 242 

 Strings, musical, manufacture of . . 32 



Submarine batteries 54 



Sugar, as food 205 



Sulphur, allotropic condition of . . 136 

 Sun, daily photographs of disc . . . 323 

 " determinations of the distance 



of 125-129 



" recent investigations respecting 324 



" spots on 325 



temperature of 134 



" and stars, comparative light of 97 

 Sun-spots and auroras 92 



Targets, hogs-hair . . . . 63 



wire rope . ' 64 



and guns, English experi- 

 ments with 58-64 



Telegraphs, submarine, cause of fail- 

 ure in 95 



Telegraphic communication, exten- 

 sion of 7 



Telescope, Foucault's great 108 



Tenebroscope, the 100 



Tertiary system, division of 342 



Thallium, new facts respecting . 175-177 



Thermometer, new sensitive .... 144 

 Thunder-storms and the moon ... 92 



Tides, utilization of 21 



Tin ore in Maine 243 



To-day, the philosophy of 79 



Torpedoes, submarine 54 



Tortoise, fossil 246 



Trees, Chinese art of dwarfing . . . 313 



" comical growth of 310 



Tunnels, railway, in Great Britain . 20 

 Type-setting, improvements in ... 29 



United States, highest mountains in 

 the 252 



Universe, is it light or dark ? .... 107 



Vapor, aqueous, properties of in the 



atmosphere 140 



Vegetable species, transmutation of 308 



Vegetation and magnetism 92 



phosphorus in ..... 315 



Vertebrate, minute 246 



Vesuvius, observations on the crater 



of 2?3 



Vision of insects 274 



Vital-force, nature of 257 



Vivisection 299 



Volcano, new submarine 226 



Volcanoes of the Malay archipelago . 336 

 Volcanic action in the moon . . 329, 330 

 Voltaic battery, influence of heat on . 91 



Walks, water-proof 26 



War, improvements in the science of 47 



" materials of a great 69 



Water, color of 108 



disassociation of. 196 



for domestic purposes .... 204 



gases in 143 



" mineral, concentration of . . 19S 

 none chemically pure .... 143 

 " relation of quality to arts and 



medicine 204 



Waterfalls, vibrating 147 



Waves, power of 87 



Weights and measures, uniformity 



of 5 



Whale, sperm, eye of 272 



Whales, how they hear 272 



Wheat from mummies 309 



improvement, in 307 



" increased yield in Great Brit- 

 ain 202 



Wind, direction of 155 



Winds, observations on 155 



Wire, use of for lathing walls ... 26 



Wire rope targets 64 



Writing, necessity for a new system 

 of 4 



Yellow-fever, curious observations 

 respecting 293 



Zoology, recent changes and prog- 

 ress in 253 



Zoological summary 290 



