370 



INDEX, 



Sand Patch tunnel 32 



Sanilwicli Isluiuls, volcanic eniptiun 



ill 2f)4 



8untoriiio, vnlcunic eruption iii , . 2C0 

 bi^'A, us 11 (Icniuling ugeut .... 250 



" (lei)tlis of 175 



" triin>])urency of lv;5 



Sen water, iictiou of upon luetals . lUl 



beu^e, sixth, in niun ;>00 



tjei|iu>ia, gijriiiitlc, size and nge of . itJ 



Sewage, iitili/ation of Ihlt 



Sexes, on the pniiluctiou of . . . :105 



SluilVi'uiipling, Unggled' .... 44 



Shooting stars .... 345, 348, ;i52 



" " spectrum of . . . 2.11 



Shot, penetration of 110 



SielHH-k"s syren Isl 



Sieuien's giui furnucea UO 



Sieiiua, American 217 



Silicate, insoluble '.iH 



Silk, from eggs of Jish 325 



" solution of 215 



Silk-proiluciug spider 317 



Singing tlumes lt<2, ls:i 



Suoku-consuuiing apparatus ... 07 



" " furiuice .... 07 



Soda, new process for making . . 201 



Sodium amalgamation . . . . 79, hi 



Solar system 'Sid 



Solvent, remarkable h4 



Sound, nature of 180 



Species, origin of in insects . . .312 

 " transmutation of . . .41, 30<.» 



SpPctroscoi)e 221 



Spectrum analysis 221, 2^12 



Spectrum of aijiieous vapors , . . 123 

 " of comet I., ls()6. . . . iU 



" of nebula in Orion . 227, 228 



" ofSirius 2.31 



" of shooting stars . . ,2^51 



Sphvgmograph 307 



Spider, silk-producing 317 



Sponges, animality of . . . . . 322 

 Spontaneous combustion of coal . 191 

 " " of pyro- 



technical compounds 191 



Spontaneous generation . , 10, 2»0 

 Stars of northern hemisphere . .352 

 " power of, iu overcoming twi- 

 light 354 



Stay-bars, hollow 54 



Steam, superheated 51 



" working of, expansively . . 173 



" fire-proof safe 83 



Steel brdge 37 



" rails 60 



" wheels 65 



" for railway purposes .... 60 



Stomatoscope 308 



Suez Canal .33 



^Sugaras a cause of animal sterility 292 

 Sulphur in a new voltaic battery , 160 

 Sulphuretted hydrogen 193 



Sulphuric acid, manufacture of . . 81 

 Sun, ajipearance of at North I'ole . 352 



" composition of 339 



" duration of lieat of .... 154 



Sun spots 169, 339 



Sunshine, etl'ect of on lire .... 151 



Superheated steam 51 



Suspension bridge, Cincinnati , . 35 



Tea, black color of 214 



Telegraph, African 178 



" Atlantic 13 



" North Atlantic. ... 25 



Telephone 181 



Temperature at great elevations . 150 

 " at which plants germi- 

 nate .334 



" secular increase of , .350 



Thallium, position of 218 



Theine, sources of 3:i5 



Thermo-electric battery 150 



" " elements .... 1.05 



Tobacco, effects of ui)on health . .301 

 Top, the pliiliisopliy of a .... 172 

 Treadwell, I'rof. L)., iuijirovemcnts 



in cannon 100 



Tungsten iron 77 



Tunnel, -Mont Cenis 32 



" Sand Tatch 33 



" under Chicago River . . . 31 

 " " Knglish Cliannel . . 31 



" " Lake Micliigau . . 20 



Vegetable oils, oxidation of . . . 208 



" parasites of rnan . . . 328 



Vessels' hulls, protection of . . . 192 



Viaducts, great 30 



Vinegar, to detect sulphuric acid in 215 



" plant 330 



Vision of lish 324 



Voices of tish . 323 



Voltaic battery, sulphur in . . . 100 



Washington Ar^ueduct .35 



Water furnace lor ores 47 



Water, resistance of to floating 



bodies 176 



Waters of tbe Dead and Red Sea 



compared 104 



Weather, signs of 352 



Wheels, chilled iron 63 



" steel 65 



White lead, manufacture of . . . 201 

 Wilde's magneto-electric machine . 158 



Wines, sediments of 189 



Wood, preservation of 72 



" processes for staining . . . 190 



Zodiacal light 342 



Zoological specimens, preservation 



of colors of .324 



Zoology of BrazU 314 



