^ INDEX. 



tions on its slow decomposition, xx, 259. On the hygrometric 

 property of sulphuric acid, 400. Apparatus for exhibiting the 

 deflexion of a magnetic needle by the electric current, ib. 



Griping, sense of, how caused, ii. 12 



Groboogan (Plains of), account of a singular volcanic eruption 

 in, i. 256 



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

 refraction, xv. 128 



■ ■' transit circle, accuracy of, determined, xvi. 189 



• comparison by, of the new tables of refraction, 



with observations, xvii. 100 



■ researches of, on the theory of atmospherical re- 



fractions, xviii. 365 

 Grotto in the interior of the Cape of Good Hope, xvi. 272 

 Grouvelle (M.), on the combinations of oxides with chlorine, 



iodine, and cyanogen, xii. 174. On various compounds of 



chromium, 319 

 — — — — disingenuousness of, exposed, xiii. 8. On the sub 



and super-nitrates, 396 

 Guaiacum, on the action of gluten on, viii. 376 

 — — — tincture of, a test for copper, x. 182 

 Guayana (Spanish), journal of an excursion from Angostura to 



the Missions of, viii. 260-287 

 Guiana, the common, observations on, xvii. 255 

 GuiBOURT (M.), abstract of his facts towards the chemical history 



of mercury, xviii. 29 1 

 Guienne, notice of the wines of, xviii. 129 



GuiNAND (M.), bibliographical notice of, and of his optical disco- 

 veries, xix. 244-253 

 Gum obtained from starch, vii. 181 

 Gums, salivations and ulcerations of, produced by hydrocyanic 



acid, xii. 428 

 Gunpowder, inflamed without a spark, viii. 183 

 ■ by whom invented, ix. 229 



analysis of, xi. 390. Fired by electricity, 391 



■■ inflammation of, under water, xv. 164/ 



