352 



INDEX. 



Earth and the moon, effects of the 



collision of 165 



" changes in the temperature of, 131 



" magnetism of 131 



" original cooling of 153 



" value of the sun's heat on . . 100 

 Earth's crust, dislocations of . . . . 307 

 " rotation, indicated by the 



barometer 147 



Education, old and new systems . . G 



Electricity and asthma 327 



" Bright's disease . . 327 

 " application of to gas- 

 lighting 120 



production of sound by . 118 

 " use of in hydrophobia . . 123 



Electric fly 122 



" light, invisible rays of ... 203 



" " new form of 121 



" " fishing by 122 



Electric-spark, photographs of . . . 201 

 Electrical phenomena, interesting . 119 



Electro-magnet, new 202 



Electro-magnetism, dynamical theo- 

 ry of 201 



Elephant fossil, curious new species, -110 

 Emerald, coloring matter of .... 247 

 Emery in the United States .... 306 



Engine, new caloric 38 



Engines, marine, U. 8. Navy ... 24 

 without bed-plates .... 23 

 Engraving, improvements in . . 79, 80 

 Entozoa, curious facts in relation to, 321 

 Experiment, curious physical . . . 210 

 Eye, motions of in vision 173 



File, improved 



Fire, breaking rocks by 



" arms, changes in discharged . 

 Fish from Artesian wells 



" preservation and culture of . . 



" eggs, interesting facts respect- 

 ing 



" ladders or " ways'' 



Flint implements, ancient . . . 289, 



Flowers, respiration of 



Forces in nature 



Forging by hydraulic pressure . . . 

 Formations, missing sedimentary . 



Forts, wrought iron 



Fossils, friable, preservation of . . 

 " the oldest recognized . 283, 



Fountain, novel 



Fraction, the, 3.14159 



Fruits, preservation of 



" gases exhaled by 



" respiration of 



76 



16 



237 



:;05 



316 



illuminating 



Gas, carburization of .... 

 " illuminating, testing of . 

 " increasing the 

 power of ... 



increasing the light of 



" lighting by electricity 



Gas-works, waste of 



Gas, absorption of, by porcelain and 



lavas 



" compression of 



Gelatin, new use for 



Geographical explorations, recent . 



316 

 317 

 290 

 314 

 199 

 45 

 309 

 102 

 178 

 304 

 151 

 21 

 52 

 315 

 314 



64 



177 



177 

 64 



120 

 70 



221 

 225 

 243 

 342 



Geology, curious facts in 310 



negative evidence in ... 308 



recent progress of 268 



Geologic evidence, minute 308 



Geological discovery, interesting . . 310 

 Geological opinions, changes in . . 282 



summary 308 



Geysers of Iceland 275 



Gho>t, real, how to detect 327 



Ghosts, photographic 185 



Glacial epoch, antiquity of . . .281,292 



" cause of 270, 301 



Gold in the sun 181 



" of California, geological age of, 299 

 Gold, extraction of from auriferous 



quartz 247 



Granite, formation of 312 



Graphite, origin of 217 



Great Britain, recent geological 



changes in 27G 



Gum, new adhesive 78 



Gunnery, curious phenomena in . . 190 



" new principle in 99 



Gun cotton, electrical properties of . 121 

 " " English views respect- 

 ing 110 



" " French views respecting, 102 



Gun-metal, new 99 



Guns, large trials of 106, 107 



" new method of rifling .... 102 



" vs. armor 110 



Gunpowder, illustrations of the force 

 of 82 



Health, effects of alcohol and tobacco 



on 234 



Hearing, inequality in the organs of 192 

 Heat, ali'ec'ting density of minerals . 161 



" and. force 151 



' conduction of 160 



" mechanical development of . 143 



" of the sun 142 



" vibrations, nature of 164 



Herschel, on standards of measure- 

 ment 17 



Huggins, discoveries in spectrum 



analysis 251 



Human fossils from Gibraltar . . . 287 

 Hurricane, greatest on record . . . 198 

 Hydrophobia, treatment of by elec- 

 tricity 123 



Ice, artificial manufacture of . . . . 

 " prismatic formation of in glaciers 



Ice-caves 



Ideography 



Illumination, artificial 



Indium, new metal 



Infusorial deposits, new use of . . . 

 Iron, absorption of carbon by . . . 



" and steel, microscopic structure 

 of 



" boilers, corrosion of 



Iron-bars, immense, rolling of. . . 



" cast, tensile strength of .... 



" reduction of by super-heated 

 steam 



" flexibility of 



" lengthened by magnetism . . 



" magnetized, crackle of .... 



65 

 163 

 16:5 



81 

 175 

 215 



72 



46 



171 

 35 



103 

 36 



47 



22 

 120 

 124 



