328 



INDEX. 



Food, as a source of muscular power 245 



" of New York city 323 



Form of the trunk of trees . . . 279 



Fossil insects 281 



Fossils, Silurian 229 



Foucault's regulator 9 



Freezing, effect of, on beer . . .211 



Fruit essences 183 



Furnace, Siemens 13 



Fuze, Beebe inertia 101 



Galena, gold and silver in .... 2.22 



Gas engine 19 



" steam generator 61 



Gases, absorption of, by solids . . 184 

 " dangerous, respiration in. . 83 

 " magnetism of ...... 170 



*Gatling battery 115 



Geography of plants 276 



Glaciers in the tropics 234 



Gland, new, in the human body . . 277 

 Glass, action of sunlight on ... 198 



" composition of 95 



" cutting 93, 94 



" drilling 94 



" from native ore 92 



" lead thallium 95 



" malleable 98 



" printing 94 



Glucose, new reagent for .... 197 

 Glycerine, crystallization of ... 196 



Glyconine 209 



Gmelinite 221 



Gold, amalgamation of . . ... 75 



" in Canada 230 



" in Nova Scotia 230 



" imitations of 78 



" in galena 222 



Governor, steam, improved . . . 173 

 Gradients, steep ... 34, 35, 36, 38 

 Grain, silica in stalks of .... 282 



Granite, nature of 226 



Great bridges 32 



" canals, contemplated ... 33 

 Green vitriol, from iron slag . . . 209 

 Greenland, miocene flora of ... 230 



Guanches 311 



Gulf Stream 128, 307 



Gum, treatment of 210 



Gun cotton 102 



Gunpowder, storage of 101 



Guns, punched steel 118 



Gypsum in Nova Scotia 219 



Hair, blanching of 237 



Haloxyline 104 



Harmony, perfect 165 



Harrison boiler 59 



Heat, of human body, how regulated 278 

 " distribution of, over earth . . 299 



" economy of 6 



Heliography 139 



Hicks boiler 61 



Holtz electrical machine .... 160 

 Homologies of muscles of fishes . 263 



Hoosac tunnel 41 



Hop stems, new textile fibre from 80 



Hot-air engine 17 



Hottina 98 



Huntoon steam governor . . . .173 

 Hydraulic cement 95 



Hydraulic press, new forms of . .164 

 propulsion ..... 20 



Ice-producing machine 85 



Incrustations, boiler 62 



Incubation of sharks 280 



Indian summer 301 



Indium 215 



Induction currents 171 



Infusoria in whooping cough . . . 279 



Inoculation of tubercle 259 



Insect makers*of iron 280 



Insects, fossil 281 



muscular force of .... 280 



Insulator, improved 86 



Intermittent fever, cause of ... 260 



Invention, lull of 11 



Iodine and carbolic acid .... 254 



Iron age of Denmark 316 



" cement 49 



" cobalt and nickel in .... 203 

 " improved processes of manu- 

 facture of 72 



" in the solar atmosphere . . . 134 



" made by insects 280 



" manufacture of, by magnet- 

 ism 63 



" ships, preservation of bottom of 96 



" silicium in 65 



" and steel, soldering of ... 65 



" stone 45 



" testing by magnetism . . . 173 



" what makes it fibrous ... 66 



Itacolumite ......... 216 



Jupiter, eclipse of his moons . . 291 

 " mass of 291 



Krupp's great cannon ..... 120 



Lake dwellings of Switzerland . . 317 

 Latent image in photography, na- 

 ture of 137 



Lattice bridge, American .... 29 

 Lead, floating on molten iron . . 129 



" perchloride of 220 



Leaves, skeleton 275 



Ledererite 221 



Lepidodendron, affinities of ... 280 



Leptographic paper 145 



Letters of Newton and Pascal . . 10 



Life, antiquity of 225, 282 



Light, electric 152, 153 



" lime 87 



" magnesium 87 



" persistent action of ... 136 



" photographic 147 



Lightning, conductors 162 



" deaths by 163 



" effects of, on wires . . 164 



Limbs, reproduction of 278 



Lime light 87 



Linnaeus, lunar crater 293 



Liquid stone 46 



Livingstone, Dr., fate of .... 306 

 Local correction, for refracting tele- 

 scopes 284 



Locomotives for steep gradients 35,36,37 



Louisville bridge 30 



Loxodrograph 139 



Luminosity of phosphorus . . . 178 



