INDEX, 



Inftrument for meafuring theabforptlon of 

 gafes, ZSS 



..» — for meafuring radiant heat, 6z 



J. P. on the coft of making phofphorus, 94 



Iron, method of preparing prulfiate of 

 potafli from, 280 



Irvine, Mr. W. on the latent heat of dif- 

 ferent fubftances, 45 



Junker, 155 



Juno, a new planet, 301 



Jurine, Mr» 150 



K. 



Keir, Mr. 103 



Kennedy, Dr. 99 



Kercher, 183 



Kirwan, 27, 47, 57, 107, 162, 270 



Klaproth, 37 



L. 



La Grave, 175 



Lambert, 284 



Lamp for burning tallow, defcription of a, 



145 



Landriani, 45 



Langwith, Dr. 135 



Launoy, 37 



Lavoifier, 24, 107, 11 1. — An aflertion 



of his controverted, 247, 270 

 Lead, on the latent heat of, 45 

 Leather, memoir on the chamoying of, 



251 

 Lefage, 249 

 Leflie, Mr. 154 



Lifts, from a mine, defcription and draw- 

 ing of an inftrument for counting them, 



114 



Light, experimental demonftiation of the 

 general law of the interference of, 63. 

 — Comparifon of the meafures of the 

 fringes of, 131. — Argumentative in- 

 ference refpcdting the nature of, 137. 

 •—Strongly refembles found, 138.— An- 

 alogy with heat, 202.— Increafes the 

 abforbent power of charcoal, 260. — Is 

 produced by the coropreifion of air> 30Z 



Lightning, on fome uncommon effefts of, i 

 Lily, mucilaginous powder from the roots 



of the white, 233 

 Linborn, M. 237, 290 

 Linen, facilitates the paflage of heat, 60 

 Liquor for rendering ftufts waterrproof, 



analyfis of, 252 

 L'llle, R*me de, on his theory of cryftal- 



lography, 27, 78 

 Llandaff, bifhop of, 54 

 Lloyd, Mr. 148 



M, 



Machines, filtering, Prof. Parrot's, 40»<-« 



Sir H. C. Englcfield's, 95 

 Magnefia, native, 222 

 Magnitude of objefts, caufe of the appa« 



rent variation in, 165 

 Malton, J. Efq. defcription of his method 



of making large port folios, 128 

 Marcet, Dr. on a cafe of deafnefs cured by 



punfturing the membrana tympani, 149 

 March, Mr. 145 

 Margraff, 267 

 Maunoire, Mr. on a cafe of deafnefs cured 



by puncturing the membrana tympani, 



149 

 Melograni, Abbe, defcription of his blow- 

 pipe, 25, 143 

 Membrana tympani, deafnefs cured by 



puncturing the, 149 

 Mendoza, Capt. 5 

 Metal, a new, defcription and analyfis of 



the ore of, 290 

 Metallic furfaces, all radiate equally, 194 

 Mineralogical fyftems of Rome de I'lfle and , 



Abbe Hauy. outlines of the, 26, 78 

 Molybdale of cerium, 299 

 Moon, horizontal, its enlarged appearance 



accounted for, 164.— Examination of 



the theory, 235 

 Morland's fpeaking-trumpet, 283 

 Morozzo, C. L, on the abforption of the 



gafes by charcoal, 255 

 Moufiin Poufhkin, Count de, his method 



of preparing malleable platina, 65 



Mucila- 



