INDEX. 



Haffenfratf on tlic propagation of found, 



117—131 

 Hatchctt, C. Efq. 10?, 154, 167, 251, 



254— His analyfis of magnetical pyrites, 



1-67 

 Hauy, Abbe, 14, 104 — Remarks on his 



experiments on the elcftricityof metals, 



57 



Heat, Dr. Irvine's experiment on the re- 

 lative capacities of ice and water for, 50 

 —Experiments fhewing it to be con- 

 veyed downward in fluids by currents in 

 fome cafes, 225 — 235 — In others by 

 the veflel, 235 

 Hemp, experiments on the culture of in 

 India, 32 — Proceffes for watering in 

 two hours time, at all fe^fons, 86 — 92 

 Henry, Mr. W. 107, 295 — His experi- 

 ments on the gafes obtained by the de- 

 ftruftive diftillation of wood, peat, pit- 

 coal, oil, wax, &c. 65 — 74 

 Herfchel, Dr. 99, 274 

 Honey, two kinds of, 61 

 Hook, Dr. 5 



Hopfon and Sylvefter, MefTrs. malleabi- 

 lity of zinc difcovered by, 304 

 Hornblower, Mr. J. C. on the meafure 

 of force by horfe powers, 95 — 99— On 

 the meafure of mechanic power, 264 

 — 271 

 Horfe powers, OM the meafure of force by, 



95—99, 145— 153> 264—271 

 Howard, Mr 167 



Humboldt and Bonpland, voyages of an- 

 nounced, 301 

 Hume, Mr. 215, 283 

 Hunter, Dr. W. 43 

 - Mr. G. 85, 196, 199 



Hybernating animals, peculiarities of, 



200, 255 

 Hydrargiilite, 153—158 



India, on the culture of hemp in, 32 — 47 



Iron, combined with fulphur, naturally 



or artificially may be rendered magneti- 



cal, 6 — Unlefs the fulphur exceeds 46 

 per cent. 8 — Phofphuret of, magnetical, 

 9 — Different fub-carburets of, 16 — Me- 

 thod of conneding bars and coating 

 them with lead, to form folid pillars, 108 

 Bed mode of afcertaining the quantity 

 of carbon contained in, 288 

 Irvine, Dr. letter on his fundamental ex- 

 periment on the relative capacities for 

 heat of ice and water, 50 — 52 



Jeflbp, W. Efq. efficacy of his mode of 



blaftlng, 241 

 Johnfon, Dr. 105 

 J, P.'s queftion refpe£ling the purification 



of copper, 107 

 Juan, Don G. 299 

 Juno, the new planet, note Qn, 57 



K. 



Klaproth, 61, 168, 169 — His difcovery 



of fluoric acid in the topaz, 58 

 Knights, MefTrs. have palladium for fale, 



304 

 Knowles, Sir Charles, 38 

 Krufenftern, his voyage round the world^ 



60 



L. 



Lagrange, 82 



Lalande's propofal of a new fcale for the 

 thermometer, 61 



Lampadius, Prof, his difcovery of fulphur^ 

 alcohol, 170 



Lamps, theory of, 72 



Langelot, Dr. Joel, 121 



Laplace, 128 



Laugier, 58 



Lavoifier, 79, 81, 82 



Lead, Goulard's extrad the proper acetate 

 of, faccharum faturni, a fuperacetate, 

 78 — Cryftallized muriate of, 135— 'Ac- 

 tion of phofphorus on folution of, 139 

 • — Method of refining in ihe large way, 

 206 — 215 



LeibnitZ) 



