N 



D 



E X. 



Kirchcr, Athanafius, i. jj6 



Univerfal Polygraph'*, it. 345 



Kirchoft", Mr. his new Procels for making 



artificial Cinnabar, ii. i 

 Kirwan, Mr. i. 48, 335. Carbon in Coil, 



i. 487. Temperature, i. 574. ii. 203, 



20;, jog, 340 

 K-laprotli, i. 77, )oo, 144, 404, 519, 536, 



544. ii. 73, 71''. 77. 289 

 ; , liis Account of a new Metal- 

 lic Subftance, denominated Tellurium, 



ii. 37i 

 , his Analyfis of Corundum, ii. 



484 

 Klcngel on Polynomials, i. 47 

 Klincock, i. 396, ii. 497 

 Kolegarten, Mr. i. 97 

 Kramp on Polynomials,' i. 47 

 Kuenh, Charles Gottlieb, i. 48 

 Kunckel, i. 444. ii. 133, 135 



Labat, ii. 258 



Laboiat ry, Economical, of Gtiytoii, ii. 210 



Labour, Prices of, st diftcrent Period, ii. 284 



La Ctiapellf, Cit. Due. i. 153 



LacaiUe, i. 194 



Lacepede, i. 46 



La Combe, C. Diftionary of Fifhery, i. 48 



Lacuee, Cit. ii. 238 



La Grange, i. 48; Bouillon, on Camphoric 

 Acid, ii. 97. On Camphor, ii. 157 



La Hire, i. 99 



Laidley, Dr. ii. 2S0 



Lake, new Procefs for obtaining from Ve- 

 getables, ii. 155 



Lakes, North Weftern, of America, ii. 315 



Lalande, Cit. i. 96. ii. 173, 233, 239 



Lamarek, Cit. Dictionary of Botany, i. 48. 

 On the Pneumatic Theory, i. 96 



ii. 236 



Lamhe, William, M.A. Analyfis of the 

 Waters of two Mineral Springs, ii. 190 



Lamethrie, Dr. ii. 39 



Lamps, i. 67. Lampof Argand.i. 69. Float- 

 ing, ii. 167. Economically ufed for Ex- 

 periments in Chemiftry, ii. 210. Self, 

 moving, ii. 167 



Lampsdius, ProfefTor, i. 142. ii. 10 



Land Culture, i. 47 



Landen, Mr. i. 541 



Landriani, M. ii. 245 



Langlc, H. F.M. en Harmony and Modu- 

 lation, i. 48 ' 



Langlts, Cit. ii. 236 



Language, Univerlal, ii. 189, 190, 342, 428 



Lar.thorns, Wire Cloth for, ii. 412 



Lapis Lazuli, Analyfis of, by Klaproth, 

 i. 77 



La Place, Mr. Pierre Simon. His Syftemof 

 the World, ii. 39, 86, 236 



Laromiguicre, i. 46 



Laffus, Cit. ii. 37, 236 



Latham, William, Efq. on a lingular In- 

 ftance of Atmofpherical Refrsftion, ii. 417 



Launoy, ii. 415 



Lauwerenberg, i. 44 



Lava, Examination of the ftony Charafler 

 of, ii. 285. 



Lavoifier, i. 69, 168, J78, 179, 237, 261, 

 485, 487, 48»- 



La/ow&i, Mr. liis new Weather Infirument, 

 ir. 1 1 



Lead, Siberian Red, ii. 3S7, 441 



Leather, improved Procefs of tanning, i. 

 271 



Leaves of Gold, Silver, and other Mttils, 

 their tiiicknefs, i. 133 



Leboffut, Cit. ii. 236 



Le lirun, ii. 62 



Ltfevre, Gineau, Cit. ii. 236, 239 



Leger, M. i. 69 



Le Gran<;e, Cit. Bouillon, his Procefs for 

 purifying Alkali, i. 329 



Leibnitz, ii. 71. On univerfal Language, 

 ii. 346, 428 



Le Lievre, M. i. 40 



Lemons, Preparation of the concrete Acid 

 of, ii. 43 



Le Monnicr, i. 99 



Lcr.ipE, i. 142 



Lens, Chryftaiine, Obfervations on its Struc- 

 ture, i. 306 



Lenfis, Achromatic, fappcfed Improvement 

 of cementing them together, ii. 233 



Lent, Adolph. C. M.D.'ii. 494 



Le Roy, Cit. David, i. 57.11. 239. Mr. ii. 

 54.' Peter, i. 53 



Ltiburne, Lord, ii. 335 



Level Spirit, Defcription and Ufe of, i. 135 



Levelling, eafy Method of, ii. 467 



Lever, Fundamental Property of the, i. 541 



Levcque, i. 46 



Lewenhoek, i. 308, 380 



Lewis, Dr. i. 486. On the Trompe, i. 526. 

 ii. 31 



Lichtenbcrg, i. 205, 396, 397 



Lichtenftein, i. 228 



Life of Bcrtrand Pelletier, Account of, ii. 37 



Light, RefraiStion of, i. 13. Remarkably 

 inflefted, i. 13. Economical Prodiiftion 

 of, i. 67. Of Lamps and Candles, Mea- 

 fure uf, i. 67. Prize Medal for Difcove- 

 rieson, i. 1S8. Its Inflexion, Flexion, and 

 Colour, i. 551, 586. Reflexion of, i. 554. 

 Affcftions and Properties of, by H. 

 Brougham, efq. ii. 14-, 193. Count Rum- 

 ford's Enquiries concerning its fuppofed 

 Chemical Properties, ii. 402. On its fup- 

 pofed Clicmical Properties, ii. 4.53. Dr. 

 Parr's Theory, ii. 547. Tranfmiliion 

 and Rcflcftion of, ii. 312. Flexion of, ii. 

 194. Of Natural Phofphori, ii. 132. Ob- 

 fervations on, ii. 396. 



Lightning, Obfervations on, by Col. Hal- 

 dane, i. 433. Experiments with Arti- 

 ficial, i. 436. Eftefts of, on a Grove of 

 Trees, i. 547. 



Ligurian Irilitute, ii. 522 



Linck, Proftflbr, ii. 71 



Linnaeus, i. 26, 138. ii. 155, 304, 333, 337 



Little, Rev. James, Account of iiis Air» 

 pump, ii. 501. 



Liver, Prize Queftions on the, ii. 237 



Liverpool, Earl of, i.«87 



Lloyd, John, efq. F.R.S. i. 96, ii. 223 



Loans, Public, Prize Q_ucftion on, ii. 238 



Lobchock, or Chinefe Candle, i. 72 



Lochtad, William, Efq. on the Natural Hif- 

 tory of Guiana, ii. 192, 297, 347 



Logarithms, Theory of an improved Line 

 of, i. 372 



Longitude, Prize Q^eftion on, ii. ^37 



S59 



Looming, or douWe Land, Appearance of 



i. IJ2. Phenomenon of. ii. 548 

 Lorinier, Dr. John, his Dipping J^Jeed!e, 



i. 428 

 Lotion. Alkaline, for 'promoting the Cure of 



the Rickets, i. 20? 

 Lowitz on the Purification of Alkalis, i. 164, 



331.11.3 

 Lowry, Mr. ii. 524 

 Lowthorpc, i. 1 1 1 

 Luc, M. de, on the Contraflion of Water 



by Cold, i. 567 

 Lucan, ii. 137 

 Luccomb, ii. 335 

 Luce, Eau de, i. 80. Compcfition of, and 



Experiments on, i. 166 

 Luther, Martin, i. 109 



M. 



Machiavcl, ii. 89 



Machine, tUftric, comparifon between Plates 

 and Cylinders of Glafs, i. 83. For cut- 

 ' ing Files, ii. 310. Elcftrical, by Fric- 

 tion of Silk, ii. 420. For ruling Lints, 

 ii. 429. For blowing by a F.iil of Water, 

 its Theory, ii. 48S 



Machines, their political Eifefts, ii. 460 



Mackay, Andrew, LL.D. F.R.S. Edin. on 

 the Latitude and Longitude of Aberdeen, 

 ii. 192 



Mackenzie, Sir. G. S. his Air-pump, ii, 

 28 



Maclean, i. 486 



Macpherlon, Mr. ii. 23 



Macquer, i. 80, i<J6, 488. ii. 37 



Macquart, Mr. i. 457 



Magellan, i. 75, 76, loS 



Magnc, J. B. i. 202 



Magiiefia, Precipitai;ion of, i. 263. Me* 

 thod of fcparating Argillaceous Earth 

 from, ii. 83 



Magnetic Polarity, i. 97. Touch, Im^ 

 provement of the Double, ii. 81 



Magnetifm, Method of exciting, ii. 8r 



Magnets, artificial. Method of making, by 

 Coulomb, ii. 80 



Mahomet, ii. 236 



Maleiherbes, M. Ic, ii. 307 



Malting, Experiments on, i. 338 



Mancheftcr, Memoirs of the. Literary and 

 Philofophical Society of, ii. 188 



Manganefe, Infufficiency of the prefent Me- 

 thods to feparate it from Iron, i. 255 



Manufafture of Hats, Improvement in, i, 



399 

 Maple Sugar, ii. 304 

 Maraldi, i. 99 

 Mardonius, ii. 319 

 Marcorelle, Mr. i. 233 

 Margraff, i. 77. ii. 31 

 Margueron, Citizen, i. 182, 227, 404 

 Mariana, i. 1 10 

 Mariner's Compafs, Account of the Me, 



chanifm for the Sufpenfion of^ i. 426 

 Mariotte, ii. 177 

 Mar,n,am, Robert, Efq. F.R.S. on the Mea. ' 



lures of Trees, i. 191 

 Martin, Benjamin, ii. 199 

 Maflcelyne, ii. 85 

 Mathematical Correfpondence, i. 45, 92, 137, 



138, 186, 188, 237, 238, 283, 284, 334, 



38*, 43» 



Mafhegiatics 



