INDEX. 



5S-S9 



De Luc, 79 



Delunel, 141 



Dempfter, G. Efq. 1 15 



Defcotib, 24 



Defcartes, 277 



Devitrification of glafs, 



Deyeux, 141 



D'Hefinger, W. on cerium, 10 



Dipoing-needle for aeroftatic experiments, 



278 

 Difcoveries, on the original inventors of 

 . certain philofophical, 1 

 Dolomieu, 11S — 166 

 Dryander, Mr. 82 

 Du Hamel, 290 

 Dutens, 149 

 Dye, a permanent red, 



129 



E. 



Earth, a peculiar one in wood-amcs, 240 



Ecliptic, queftion refpecting an apparent 

 error in calculating the obliquity or' the, 

 302 



Electricity, method of exhibiting that of 

 metals without a condenfer, 42. — Ob- 

 fervations and doubts concerning at- 

 mofpheric, 294. — Queftion refpecting 

 its identity with galvanifm, 302 



Electrometer, defcription of Weifs's, 294 



Emerfon, Mr. 234 



Emmerling, 265 



Engiefield, Sir H. C. on the original in- 

 ventors of certain philofophical difco- 

 veries, iT—145. — His procefies for ob- 

 taining a durable and fupeiior lake from 

 madder, 215 



E. O. hiftorical and critical obfervations 

 by, 145 



Erman, Mr. extract of his memoir on at- 

 mofpheric electricity, 294 



Euler, 68— 163 



Extract, colouring, of lac, properties of, 

 95 



F. 



Faujas St. Fond, iSS 

 Ferrilite, 115 



Flamfte.id, 146 



Fruids, electric and galvanic, queftion re- 

 fpecting their identity or diyerfity, 302 



Fontana, 226 



Fortin, 278 ' 



Fofiils, converfion of organized bodies in- 

 to, iti 



Fourcroy, 24 — 48 — 139— 141 



Fuming liquor of Cadet, memoir on, 6 



Fnfion, the vitreous, is diftinct from, that 

 of falts, 58 



G. 



Galileo, 3 — 92 — 146 

 Gallate of cerium, 10 

 Galvanifm, obfervations refpecting, 30— 

 56. — Difficulties refpecting the decom- 

 pofition of water by, 106.^— Queftion 

 on its identity with electricity, 302 

 Gafes, on the abforption of them by char- 

 coal, 12 



— mixed, further obfervations on the 



conftitution of, 20 

 Gay-Luflac, account of his aeroftatic voy- 



»ge, 278 

 Geoffroy, 47—141 



Geology, application of the phenomena of 

 the devitrification and crystallization of 

 glafs to, 91 

 Giefe, 246 



Glafs, on the devitrification of, 58 — 89. 

 — Cry Utilizations in, 90. — Revivifi- 

 cation of, 91 

 Gluten of lac, properties of the, 97 

 Gold, its ductility renders it unfit for 

 fhowing the incompreffibility of water, 

 2 

 Goffe, 301 

 Gottling, his method of obtaining benzoic 



acid, 87 

 Gough, Mr. J. his obfervations on the 

 conftitution of mixed gafes, :c. — His 

 experiments and remark* on the aug- 

 mentation of f)unds, 65. — His mathe- 

 matical theory of the Ipeaking-trumper, 

 160. — On certain properties of triangles, 

 234 



b 2 Gouilby, 



