452 



INDEX. 



Glass, chemical composition, Gold, ii. 99 



ii, 91 — manufacture of, ii. Gravity,!, l^ — specific, i. 117 



235 Grottoes, artificial, ii. 330 



Glauber's salts, ii. 83 Gum, ii. 126 



Glucine, ii. 93 Gunpowder, composition of, 82 



Glue, ii. 292 Gypsum, ii. 88 



Glutin, ii. 128—148 



H. 



Hair-rope machine, i. 195 

 Harmony of sound, i. 228 

 Hops, ii. 157 

 Hydraulics, i. 176 

 Hydrocarbonate gas, ii. 59 

 Hydrocyanic acid, ii. 74' 

 Hydrogen, ii. 4'9— an acidifying 

 principle, 54? 



Hydrometer, i. 120 

 Hydrostatics, i. 106 

 Hydrostatic balance, i. 118 

 Hydrostatic bellows, i. Ill 

 Hydrostatic paradox, i. 109 

 Hygrometer, 15 i. 2 



L 



Japanning, li. 248 



Impenetrability of matter, i. 2 



Inclined plane, i. 43 



Ink, method of making, ii. 306 Iridium, ii. 121 



— , sympathetic, ii. 308 Iron, ii. 104 — ores of, 106 



Ink, Indian, ii. 346 

 Iodine, ii. 66 

 Invisible girl, i. 230 



Kelp, ii. 213—235 



K. 



L. 



Lac, ii. 129 



Lacquering, ii. 258 



Landscapes, drawing of, ii. 400 



Lead, ii. Ill 



Leather, nature of, ii. 201 -^ 

 tanning of, ii. 202 



Lever, i.24 



Light, velocity of, i. 232 — • 

 refraction of, 234 — con- 

 sidered chemically, ii. 33 



Lens, i. 236 — burning, i. 240 — 

 focal distances of, 243 



Lime, ii. 87 



Linen, bleaching of, ii. 160 



Lithia, ii. 84 



Lithography, ii. 445 



Lixiviatio%ii. 8 



Loadstone, ii. 105 



Lute, used in chemical ope- 

 rations, ii. 9. 304 



N. 



Narcotic principle, ii. 1 32 

 Nickel, ii. 117 

 Nitrates, ii. 46 



Nitrate of potash or nitre, ii. 



81 

 Nitric acid, ii. 45 



