INDEX. 



395 



PAGE 



Fibrous substances, improved machine- 

 ry for picking, 79 

 File-making by machinery, 121 

 Fire-arms, Weaver's breach-loading, 97 

 Fire-engines, springs for, 76 

 Fishes, fluorine in the scales of, 231 

 " new generic type of, 336 

 Flax and hemp, cultivation of, in Europe, 333 

 Flooring, improved, 116 

 Flowers, photographic impressions of, 175 

 Fluorine, in the scales of fishes, 231 

 " isolation of, 231 

 Food, and its adulterations, 254 

 Footprints, fossil, connection of, with 



the theory of progressive development, 314 

 Force, physical, Faraday's views of, 161 

 Fossil footprints, Lea's monograph of, 13 

 Fossils, interesting, 321 

 Franklin, Sir John, additional informa- 

 tion concerning, 21 

 Frozen wells, 190 

 Fuel, consumption and economy of, 69 

 Furnace, smoke consuming, 68 

 Woodcock's improved, 75 

 Furnaces, improvements in, 68 

 " refuse of smelting, 207 

 Furniture, proportion of colors in, 168 



Gas from peats, 247 



" purification of, 247 



" regulators, 132 



" Palmer & Woodruff's 



improved, 133 



Parkam's improved, 133 

 Gate, Thompson's circular self-acting, 134 

 Gelatine paper, for coloring light, 

 Geological memoranda, 292 



Geology of Central Africa, 2S5 



Gilding, electro, new process of, 221 



Glass, new method of engraving on, 117 

 Globe, superficial changes in the meri- 

 dional structure of, 300 

 Glue, manufacture from old leather, 252 

 Glycerine, manufacture and properties 



of, 236 



Goitre, cause of, 274 



Gold, arborescent and crystalline, 330-1 

 " Bundle's method of separating, 228 

 Grain-scale, Bramble's, automatic, 120 



Grate-bars, self-retaining, 68 



Gravity, Faraday on, 161 



Guatemala, antiquarian discoveries in, 19 

 Gun, Lancaster, 90 



Gun-cotton, 277 



Gunpowder explosion, effects of, 193 



Gutta-percha, 127, 248 



Hair, observations on the structure of, 361 

 Hats, improvements in the manufacture 



of, 127 



HATES, Dr. A. A ., 257, 303 



Hay-press, Dederick's improved, 133 



Heating apparatus, improvements in, 67 

 Hood, mount, ascent and measurement 



of, 301 



HOOKER'S plants of British India and the 



Himalayas, 336 



Hoops, improved machine for sawing, 113 

 Horn, softening, 277 



Hydraulic limes and cements, 

 Hygrometric regulator, 198 



Hydrogen distillation of coal in, 



PAGE 

 246 



Ichthyosaurus found within the arctic 



circle, 314 



India, electro telegraph in, 144 



India-rubber, artificial, 248 



lining for ships, 31 



Infernal machines, Eussian, 93 



Inks, composition and preparation of, 234 

 Insects, impressions of, in the Triassic 



Rocks, 322 



Iodine, separation from bromine, 530 



Iron, ammonia formed in the smelting of, 206 



" improvements in puddling, 229 



" native, occurrence of, in Liberia, 303 



in Canaan, Conn., . 306 



" ore, distribution of, in the earth, 303 



" pavements, 77 



" rails, comparative duration of, 51 



" rail-road car, 63 



Ivory carvings, models of, 15 



JONES, Eev. G., on zodiacal light, 374 



KANE'S, Dr., Arctic expedition, 371 



Lac, production of, 357 



Lake, ancient, in the Colorado desert, 238 

 Lamps, improvements in, 119 



Lancaster Gun, what is, 90 



Land, modern elevation of, 300 



Lathe for cutting irregular forms, Wait's, 112 



" improved metal. 117 



Lead, silver, and copper, separation of 



the ores of, 224 



Leather, improvements in japanning, 130 



u 

 <t 



" tanning, 



250 



old, manufacture of glue from, 252 

 Liberia, native iron in, 303 



Life-preservers, Thompson's improved, 131 

 Light, influence of, on the germination 



of seeds, 339 



" zodiacal, 374 



Lightning, chain, causes of, 142 



conductors, termination of, 139 

 Lignites, character of some, 317 



Linseed-oil cake, used in the manufac- 

 ture of soap, 242 

 Liquors, alcoholic, certain curious mo- 

 tions of, 202 

 Lithium, metallic preparation of, 218 

 Lithographs, obtaining by photography, 189 

 Lock, door, improved, 126 

 Locomotive, extraordinary trial of, 54 

 Longitude between Greenwich and 



Paris, 18 



Loom, Broadbent's improved, 79 



" Talbot's 80 



Looms, improvements in, 79 



Labrication, oils for, 241 



Magnetism, solar, 160 



Mammoth, epoch of, 320 



Manganese, detection of, 226 



Manure, distributor, broadcast, 122 



Maps and designs, enlarging and reduc- 

 ing, 119 

 Marble, verd antique, in Vermont, 

 MASCHER, Mr., on the stereoscope, 173 

 Masts, improvements in, 

 " supporting, 



