INDEX. 



page 

 Cooper, Mr. Astlev. Observations on the effects which take 



place from the destruction of the membrana tympani of the ear, 151 

 Corallina Opuntia, experiments on, - - go^ > 062 



Cruickshank, Mr. on the matter remaining after the explosion of 

 gunpowder, - _ _ . 237 



E 



Ear, on its membrana tympani, - _ _ 1,151 



on the uses of its different parts, 8 



Eel, electrical, on its electric apparatus, - _ 429 



Electricity, its effect on carbonic acid, - 202 



■ on fluoric acid, - 202 



■ " on muriatic acid, - - - 190 



on that excited by the contact of conducting substances, 403 



Elephant, on its organ of hearing, - - _ 2, 19 



F 



Feather, experiments on, - 072 



Fire-heat, on its reflection, T goo, 305 



on its refraction, - - _ Z ll > "6 X 5 



on its transmission, - 476, 524 



Fish, experiments on their light, - - . ifo 



on their organ of hearing, - - _ 1 r 



Flame-heat, on its transmission, - 462, 524 



Fluids, elastic, on the vibrations of different ones, - 124 



Flustra foliacea, experiments on, - - 334, 362 



Focus, on that of the rays of heat, - 444 



G 



Gas, muriatic acid, effects of electricity on it, - - 190 



■ -- ■ ■ effects of electrifying it with inflammable sub- 

 stances, - - - 194 

 Gelatin, remarks on, - 366, 376, 396 

 Glow-worms, experiments on their light, - - 178, 180 

 Gorgonia, experiments on various species of, - 338, 362 

 Gunpowder, comparison of its strength with that of fulminating 



mercury, - 207, 236 

 on the matter remaining after its explosion, - 237 



H 



Hair, remarks on, - - - 371 



Hatchett, Charles, Esq. Chemical experiments on zoo- 

 phytes; with some observations on the component parts of 

 membrane, - - - - 327 



Heat, on its different refrangibility, - - 255, 271, 438 



— — on the solar and terrestrial rays which occasion it, 293, 437 



