r 43S 3 



INDEX TO VOL. IV. 



ACET^T of copper, metliod of manufafturing, p?ge 171, 

 Acet'ile of cfper, on tl»e manufacturing of, 71. 

 Acidt tungfiic, experiments on vegetable colours with, 8j. 

 Acouflk cxpLvi.n.nts by Chladni, in. 



by PriclHey, 283. , 



■ by Perolle, 284. 



^ by Voigt, 347. 



Aernfationy improvement in, 107, 



Agenda for forming a theory of the earth, 6S, 188, 259, 351. 



American PhUofophkal Soc'uty, circular letter by, 43 I, 



Ammonia, a cure for the bite of fnakes, 192. 



Aiumalculis, account of fome, 397. 



Animal deilricity, obfervations on, 59, 163, 332. 



Animals, on mutilations becoming hereditary in, I, 



Apparatus for the combuftion of phofphorus in oxygen gas, 8^. 



Apparatus for meafuring the heat in furnaces, 2^5. 



Ara7iia obietrix, defcription of the, 121. 



AJia and Europe, query refpedling the boundaries of, 327. 



AJay furnace, dclcription of Mr. Mufhet's, 25 5. 



AJironomjf Lalandc's hiilory of, for 1798, 23. — A comet, 434. 



Barfrom's voyage to Spitfbergen, 139. 



Balloons, plan for navigating, 107. 



Banian tree, account of a, 360. 



Barometer, defcription of Humbolt's portallcy 304. 



Bechfiein on the origin of the goffamer, J 19. 



Bcckman^ obfervations on pumice-ftone, 423, 



Beet-root, on the manufadlure of fugar from, 218, 334. 



Bindhcim on the different kinds of Cadmia, 250, 36a. 



Biographical memoirs of De Saussure, 96. 



■ . of Charles Theodore, eledor palatine, III. 



of Revely the archite<ft, 220, 



' — — of borda the ailronomer, 223. 



Blaci paint, difcovcry of a new bafis for, 334. 



Blue, method of preparing /«/-»/o/, 17- 



Blumenbach on the hereditary eifeds of mutilations; I. 



Bolides or fre-lndls, one fceu in Kent, 434. 



Borda (the a(tronoiiicr), biographical memoirs of, 223. 



BoiiTbon, gcographiciil defcription ot, 204. 



F f 2 Brewn*i 



