INDEX. 



DIafpore, 158 



Dodd, Ml". G. his improved, gun-lock, 

 28 



Douglas, Mr. T. 36 



DriefTen, 133 



Duhamel, 38 — On the refining of lead In 

 the large way, 206 — 215 



Dumeril, A. M, Conftat, his •lem«ntary 

 treatife on natural hiilory, 6a 



Duncan, Dr. jun. 75 



Dundonald, Lord, 69, 74 



Dutertre's fcapemenc an old German in- 

 vention, 5 



Eaft Indies, information on the mines and 

 manufaftures of the, 294 — 298 



Edelcrantz, Sir A. N, his fafety valve 

 containing a vacuum valve in the fame 

 holes, 243 



Elc<Stricity, atmofpheric, obfervationsand 

 doubts concerning, 17 — Of metals, re- 

 marks on, 56, iio — Very fenfible in- 

 ftrument for weak degrees of, 136 



Emmerling, 14 



Erm?in, Mr, on atmofpheric eledlricity, 

 17—19 



Europeans, two found at the Marquefas, 

 who had forgotten their language, 60 



F. 



Filh eje£led from volcanoes, 303 



Fluids, on the delcent of heat in, 225— 



235 

 ■ — primary animal, on the definite 



charadlers of, 244- — 254 

 Folfi!, new, 153 — 15S 

 Fourcroy, 59, 75, ^4, 163, 164, 181 

 Fulhame, Mis. 138, 139 



Galvaaic pile incapable of receiving a 

 tranfmitted charge, 144 — Rank of mi- 

 ■ nerals, 169 



Gafes, combuftiJDle experiments on, as 

 applicable to the purpofes of giving light, 

 65—74 



Gate for fields improved, 23 — 27 



Gay, 129 



Gehlen and Rofe, failure of their attempt* 

 to produce palladium, 61, 164 



Gelatine, experiments and obfervatlons on, 

 250 



Geographical and topographical improve- 

 ments, 202 — 206 



Goettling, his advantageous mode of pre- 

 paring muriate of barytes, 133— Me- 

 tlkod of ft;parating copper from filver, 

 142 — Mode of decompofing fulphate of 

 barytes and preparing the muriate, i6l 



Gold, new and cheap method of purifying, 

 125— Aftion of phofphorus on folutioix 

 of, 139 



Goodrich, Mr. his fcapemcnt not new, 4 



Gough, Mr. J. 237— His invsftigation of 

 the properties of certain lines drawn in 

 a circle, 29 — 31 



GoulardV extradl, experiments on the 

 analyfis of, 75—579 



Gregor, Rev. W. 158 



Gregory, Mr. O, his treatife on mecha- 

 nics announced, 144 — Remarks on 

 horfe powers, 145 — 153 — Obfervationa 

 on his remarks, 265 — 271— Miftake ia 

 his remarks corredled, 304 



Gum, refembles mucus, 254 I 



Gun-lock, defcription of an Improved 

 one, 28 



Guyton, 163 



H. 



Hales, Dr. 81, 82 



Harding, the difcovercr of the planet 



Juno, 57 

 Kardy, Mr. W. his accurate method of 



banking the balance of a time-keeper, 



U4 

 Harrifpn, Mr. T. his prefs for botanic*! 



fubjefts, 236— 240— His experiment* 



on Mr, JeiTop^s mode of blafliqg, 241 

 b a HaOenfrau, 



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