INDEX. 377 



surface, and of the different strata found beneath it, 79-92, 186- 

 189 ; experimental data on the temperature of the surface of 

 the earth, 173 



Education, state of, in Ireland, 220-227 



Egyptian mummy, description of, 261-263 



Electro'dynamic force, intensity of, 147 



Elk (fossil), of Ireland, description of, 269 



Embossing on wood, new method of, 134, 135 



Emery, mode of preparing, 135, 136 



Etna (Mount), account of the eruption of, in 1819, 227^234 



Farraday (M.), on peculiar cases of the formation of ammonia, 

 and on the means of testing the presence of nitrogen in certain 



. states, 16 ; his tubes for containing scarce fluids, 149 ; on 

 compositionof crystals of sulphate of soda, 152; on artificially 

 crystallized chromate of lead, 155 ; on electro-magnetic cur- 

 rent, 338 ; on electric powers of oxalate of lime, 338 ; on colour 

 of glass, as affected by light, 341 



Fish, experiments and observations on the transportation of, 

 from salt to fresh water, 238-243 



Fontenelle^M.), process of, for preparing ink similar to China 

 ink, 141 



Formic acid, composition, 8fc. of, 355-358 



Fossil remains, observations on, 190-194; description of the 

 fossil elk of Ireland, 269 ; of the iguanodon, a fossil reptile, 

 found in Tilgate Forest, 304 



Frog, observations on the changes of the ovum of, during the 

 formation of the tadpole, 295, 296 



Frosty power of building materials to resist, 136, 137 



Fulminating powders, explosion of, 348, 349 ; notice of Moretti's 

 fulminating acid, 349, 350 



Gallic acid, conversion of, into ulmin, by oxygen gas, 353 



Gaseous mixtures, action of Platinum on, and its application to 

 their analysis, 101-103 



GayLussac (M.), abstract of his report on paratonnerres or con- 

 ductors of lightning, 143-147 



Gcmellaro (Signor M..J, account by, of the eruption of Mount Etna, 

 in 1819, 227-234 



Geoffroy (M.), the first producer of tlie alloy of antimony and po- 

 tassium, 152 f 



Geology, remarks on some crude theories of, 64 ; abstract of Dr. 

 Thos. Burnet's theory of the earth, 65, 6Q ; of Dr. Woodward's, 

 67, 68 ; geological researches of Mitchell, 69 ; and Whitehurst, 

 70 ; sketch of the Neptunian theory of Werner, 72-74 ; and 

 of the Phitonic theory of Dr. Hutton, 74-76 ; order of Mr. 

 Brande's lectures on geology, 77, 78 ; account of the earth's 



