INDEX. 



Game-cocks, see Cocks 

 Gas, inflammable, produced from coals, 

 170— From peat, experiments and 

 observations on, 241 — See Gass 

 Gasca, Don Mariano La, his discovery 



of the Iceland lickenin Spain, 210 

 Gaseous illuminations, 73, 83 

 Gases, mixed, theory of, 4 

 Gases transferred over water or mercury, 



apparatus for effecting, Q77 

 Gay-Lusac on the proportion of the con- 

 stituent principles of the atmosphere, 

 75 

 G. C on the exhibition of the * Invi- 

 sible Girl,' 119 

 Gellibrand, Mr. 302 

 Giffard's ♦ Account of Zealand', 315 

 Gilding by means of zinc, 159 

 Gilpin, Mr. his improved crane, 160— 

 On the variation and dip of the mag- 

 netic needle, 294 

 Glaciers of Chamouny, 585 

 Gnats, inquiry as to the best means of 



security against their bite, 326 

 Goodvirin, Dr. on the cause of death 

 from suspension and submersion, 348 

 Gough, Mr. on the theory of mixed 

 gases, and the state of water in the 

 atmosphere, 4. 

 Graham, Mr. 303 

 Graudi, Mr. his method of preparing 



pannels for painters, 316 

 Grapes, cultivation of, 140 

 Grease spots, inquiry respecting, SIB 

 Gregor, Mr. his discovery of the semi- 

 metal menacane, 128, 138 

 Gunter, Mr. 302 

 Guy ton, M. on turquoises, 189 



H. 

 Hadley's specula for reflecting tele- 

 scopes, 39 

 Hales on the circulation of sap in trees, 



61, 66 

 Haley, Mr. John, jun. 169 

 Halier on the origin and nature of irri- 

 tability, 347 

 Halley, Dr, on the variation of the 

 compass, 302, 304 



Halliday, Dr. on the naturtl history of 

 herrings, 151— Letter from, contain- 

 ing observations on Professor Leslie's 

 theory of caloric, 270 

 Halo, a new kind of, 237 

 Hamilton, Dr. J. A. on comparative 



micrometer measures, 23 — See 284 

 Hamilton, Sir William, 281, 285 

 Hardy, Mr, W. his new compensation- 

 balance for a time-keeper, 120 

 Harrison's clock, which requires no 



cleaning, 159 

 Hauy, M. 129, 183, 189 

 Hay, Mr. J. on the trees of Norway 



and Scotland, 145 

 Headrick, Mr. 365 



Heat, Professor Leslie's theory of, 270 

 Heating rooms by steam, 326 

 Heberden, Dr. 302 

 Helicteris isora, used in Malabar for 



making twine and cordage, 232 

 Hemp, on the culture, properties and 

 comparative strength of, and other 

 vegetable fibres, the growth of the 

 East Indies, 323 

 Henry, Mr. Wm. 242 

 Herbert, Mr. P. his bolt for book-case 



doors, 154 

 Herring, sketch of the natural history 



of, 151 

 Herring-fishery, its advantages to Scot- 

 land, 147 

 Herschell, Dr. his improvement of re- 

 flecting telescopes, SO 

 Hersart, M. Ch. his account of the 

 manufacture of forged iron vessels at 

 Fromont, 196 

 Hibiscus, of India, its use in the ma- 

 nufacture of cordage, 231 

 Holme, Dr. communication from, 4 

 Home, Professor, 364, 592 

 Hornblower, Mr. his portable fire-en- 

 gine, 318 

 H umboldt. Von, on the proportion of the 

 constituent principles of the atmos- 

 phere, 75— His discovery of rutile, 132 

 Hume, Mr. on the carburetted hidro- 

 gen gas procured from coals, 170 



Hunter, 



