INDEX. 423 



Ergot, on the origin of, notice of, 189-191 



Etruscan vases, observations on their manufacture, 163, 164 



Faraday, (M. Esq.) on new compounds of carbon and hydrogen, 

 and on certain other products obtained during the decomposition 

 of oil by heat, 348-355 



Figure of the earth, experiments for determining, 141-159 



Flying Jish seen in the channel, notice of, 412 



Fogs of the polar seas, remarks on, 11-13 



Fresnel (M. A.) on the repulsion exerted by heated bodies at sen- 

 sible distances, 164-167 



Frost, (John, Esq.) remarks on the mustard tree of the Scriptures, 

 57-59. On a new emetic oil, 59, Observations on the ex- 

 pressed oil of the seed of the croton tiglium, 231-234 



Galvanometer (new), notice of, 170-172 



Gas, inflammable, inspiration of, 393,394 



Gas, expansion of, correction of an error in, 294,295 



Gay-Lussac, letter of, to Mr. Daniel on the expansion of gases by 



vapour, 294, 295 

 Geology, outlines of, 24 ; position of chalk strata, 25, 26 ; its organic 

 remains, ibid., 27; flints, ibid., 29 ; varieties of sand and clay, 29 ; 

 Portland stone, 31 ; oolitic formation, 32; old red sand-stone, 

 red marl, gypsum, 33, 34 ; salt deposits, 35 ; coal formation, 

 iron-stone, 36-38 ; faults or dikes, ibid. ; theory of the origin of 

 coal, 39, 40 ; limestone, 235-238 ; toadstone, 238, 239 ; old 

 red sand-stone of the Wernerian school, ibid., 240 ; grauwacke, 

 240, 241 ; clay-slate, its aspect and various contortions, 241- 

 247 ; granitic formation, 248, 249 ; hornblende, ibid. ; serpen- 

 tine, ibid., 250 ; aspect of granite tracts, 251-253 ; gneiss and 

 mica-slate, 253-255 ; junction of granite and mica-slate, 255 ; 

 with other rocks, 256 ; observations on the theories to account 

 for the various appearances and irregularities of the surface of 

 the earth, 256-259 

 Gilbert, (Davies, Esq.) on the vibrations of heavy bodies, 69-73 

 Girard, (M. P. S.) on the attraction manifested at sensible distances 

 by solid surfaces moistened by and immersed in a liquid, 379-383 

 Glass, action of water upon, with some observations on its slow 



decomposition, 259-264 

 Granville, (A. B., M. D.) essay by, on the Egyptian mummies, and 

 observations on the art of embalming among the ancient Egyp- 

 tians, 337-343 

 Greenwich, latitude of, computation of, 98-100 — 108-112 

 Griffiths, (J. R. Esq.) description by, of an instrument for destroy- 

 ing stone in the bladder, 21-24 

 Griffiths, (Mr. T.) experiments by, on the action of water upon 

 glass, with some observations on its slow decomposition, 259-264 



