INDEX. 



Copying procefs, 147 



Corrindon found near Philadelphia, 151 



Corrugations, folar, 18 



Coffigny, 160 



Coulomb, on magnets, 71 



Cream ufed to clarify fpirits, 257 



Crcll, 34 — His procefs for obtaining fe- 



bacic acid defcribed and examined, 37, 



151 

 Creufe Latouche, 160 

 Crichton, Dr. 26 

 Cruickfhank, Mr, Dr. Prieftley's reply to 



his obfervations, 181 

 Cryftals, inftrument for meafuring their 



angles, 132.— Le Blanc's method of 



obtaining them very beautiful and large, 



191 



Currents in hot liquids whether they exift, 



by D\. Thomfon, Sj 

 D. 



Davy, Mr. H. his new eudiometer with 

 fulphate of iron, 41.— On the abforp- 

 tion of nitrous gas by the fulphate and 

 muriate of iron, 107. — Lectures on 

 chemivtry, 135. — His pile for galva- 

 nifm with one met.il only, 143. — With 

 two metals, and the current reverfed by 

 changing the fluid, ib. — On a galvanic 

 combination with charcoal and fluids, 

 j 4,4. — New and curious inflammation 

 of combuilibles by, 296, 297 



Darcet on a pigment with cheefe, 212 



Dark glades, their place fupplied by li- 

 quids, 21, 224 



Darracq, Cit. on the fuppofed cobaltic 

 acid, 238. — His examination of the 

 fuppofed cobaltic acid, and experiments 

 ihewing it to be arfenic acid and cobalt, 



3°4> 3°9 

 Deafnei's, Mr. Aftley Cooper on, 10a 

 Decandolle, 205 

 De Lafons, Mr. his free efcapement for 



time pieces, 251 

 Delam'bre, Cit. account of the tranfactions 



of the Injlitute of France, 69 

 Delametherie, 135 

 Delineation of objects, advantages of an 



early habit of, 282 



Delong, 159 



Denorgeltes, ib. 



De Sauflure, 143 



Dcfcroizilles, 123 



Dijon, procefs of for obtaining febacic acid, 

 defcribed and examined, 37 



Difcovery of new planets, how accom- 

 pli fhed, 285 



Dolomieu, on the art of making gun- 

 flints, 88 



Doubter, Electrical, 185 



Drains,- caufe of their offenfive frriell, 280 



Drying oils, Mr. Sheldrake oh, 259 



Duc-la-Chapelle, 70 



E. 



Earth eaten by certain favage nations, 



152 

 Edgeworth, Maria, 281 

 Edgeworth, R. L. Efq. on the practlca* 



bility of a general fyftem of rail-roads, 



221.— His cheap, Ample, and portable 



inftrument, for taking objects in per- 



fpective, 281 

 Electricity from mere contact of meta's, 



135, 184 

 Electrometer of Volta, 136 

 Elements of Chemiftry by Murray, 75, 



239 

 Emerald found in France, 238 

 Engine for raifing water by preffure, by 



Mr, Trevithack, 161 

 Englefieid, Sir Henry, on the planet Ceres, 



197 

 Entertaining experiments, 295 

 Efcapement for watches, a new and free 



by Mr. De Lafons, 251 

 Eudiometer, new, by Davy, 41 

 Euler, Mr. 1. 

 Euftachian tube, remedy for its clofure, 



105 



Fat, acid of, Cit. Thenard on, 34 

 Fiedler on the purification of gallic acid. 



236 

 Filtering ftone, a bad contrivance, 255 

 Filtration, procefs of, 229, 253 



b 2 Fire, 



