INDEX. 



•Cough's ftrJdlures on his theory of 

 mixed gafes, 89, 113, 126. — Mr. 

 Cough's reply, 160, 177, 269 



"Dauvin, Dr. his hypothcfis of fairy rings, 3 



Daval, Mr. 135 



Davy, Mr. 104, 170 



Deafnefs cured by pundufing the mem- 

 brana tympani, 149 



De Lalande, 142 



Delambre, ib> 



Delamatherie, 203 



D'Eihuyer, 290 



De Luc, 96 



Denfity of water, maximum of, iia 



Defagulicrs, 215 



DeSaufTure, 9(J, i6a, 196 



Deformes, 92 



Dilatation does not alter the contaft of the 

 elementary parts of bodies, 249 



Dormice, prize queftion refpefl:ing the tor- 

 pidity of, 141 



E. 



Ear-trumpets do not tranfmit found by re- 

 flexion, 285 



Eggs of hens, on the commerce of, and on 

 their prefervation, 264 



Ekeberg, 237 



Elafticity of bodies, experiments on the, 



Eleftrical condenfer, new compound, 19 



Eleftriclty, obf^rvations on, 175.— Pofi- 

 tive and negative, probably not diftindl 

 fluids, iSo.— Frothing of oil by, 221 



Elementary particles of bodies, on the con- 

 taft of, 247 



Enamel, red, 268 



Englefield, Sir H. C. on the pmrification 

 of water by filtration, 95 



E. O. on the computation of fquares and 

 cubes, 4, 123, 17X 



E. T. on the method of eftimating the va- 

 lue of fteam-engines in horfe powers, 

 214 



Ether, does not diflblve ftarch, 74 

 Evaporating far&aces, on the conftruaion 

 •f, 204 



Expanfion doea not require a ceflatlon of 



contaft, 249 

 Extraftive matter of pepper, 71 



Fairy rings, obfervations on, 5 

 Ferments, prize queftion refpefting, 142 

 Filtering machine. Prof. Parrot's, 40,— 



SirH. C. Englefield's, 95 

 Firft mover, method ©f obtaining the. 



greateft poffible effefts from, 275 

 Flame does not communicate heat to water, 

 203 . •, 



Fluids, obfervations on their power of con- 

 ducing heat, 207 

 — — eleftric, one of the conftituent prin- 

 ciples of water, 120 

 Fourcroy, 95 

 Framings, triangular, advantages of. 111 



fhips, 168 

 Fringes of light, experiments on, 63, 130 

 Fulminating filver, accident with, 203 

 Furnaces, evaporating, on the conftrudion 

 of, 204 



G. 



Gahn, Mr. 294 



Galvanic, 175 



Galvanifm, its efteds afcribed to chemical 

 affinity, 121.— Obfervations and ex- 

 periments to elucidate the powers of, 

 179. — On the laws of, 240 — Experi- 

 ments on the decompofition of water by, 

 243.---Curc of rheuraatifm and palfy 

 by, 246 



Gafes, experiments on the abforptlon of 

 the, by charcoal, 262 



— — mixed, on the conftltution of, 5a, 

 89, i6o 



Gaufs, Dr. iiz 



Gibbs, Dr; 180 



Geobert, 222 



Glue, facilitates the paflTage of heat, 60 



Gough, Mr. on fome uncommon effefts 

 of lightning, i.— Obfervations on fairy 

 rings, 3. — Reply to Mr. Dalton on the 



con- 



