390 INDEX. 



Flowers, action of, on air, 317, 318 



Fluids, action of heat and pressure on, 145 — 147 



Fresnel (M.) observations of, on the ascent of clouds in the 



atmosphere, 165, 166 

 Fungi, notice of new species of, 172 



G 



Gases, new test for ascertaining the dryness of, 160. Con- 

 densation of them into liquids, 74 ; 163 



Gas-Lighting in London, extent of, 367 



Gay-Lussac, experiments and observations of, on the cold pro- 

 duced by the evaporation of liquids, 294 — 297 



Geologies, Mineral and Mosaic, comparative estimate of, ana- 

 lyzed, 108—127 



Gilbert (Davies, Esq.), researches on the vibrations of heavy 

 bodies in cycloidal and circular arches, &c., 90 — 103 



Glaze, improved, for red earthen ware, 142 



Grain, preservation of, from mice, 140 



Green Colour, account of the preparation of a new one, 309, 

 310 



Groombridge (Stephen, Esq.), empirical elements of a table of 

 refraction, 128—131 



Gunpowder, inflammation of, under water, 164 



H 



Haloes, artificial formation of, 367 



Harrogate, analysis of a new sulphur spring at, 82 — 89 



Hart (Mr. John), experiments of, on the production of light by 

 discharging an air-gun, 64 — 66 



Harvey (George, Esq.), experimental inquiries relative to the 

 formation of mists, 5.5 — 64 



Heat and pressure, action of, on certain fluids, 145 — 147. In- 

 stance of heat, produced by the friction of a solid against a 

 liquid, 162 



Horticidtur at Society, proceedings of, 105 — 107 



Humite, analysis of, 324, 325 



Hydrate of chlorine, experiments on, 71 — 74 



Hydriodide of carbon, new mode of obtaining, 297, 298 — 301 



Hydrocyanic Acid, preparation of, 380 



Hydro-parabolic Mirror, notice of, 137 



Hydroxantkic Acid, preparation of, 304. Account of its pro- 

 ducts and combinations, 305 — 309 



I 



Indigo, some points in the chemical history of, 152 — 154. 



Important discovery of British indigo, 140 

 Intelligence (Miscellaneous), in Mechanical Science, 136 — 144 ; 



