rela'ing to the analyfis of atmofpherical air, Vol. IV. p. i to ii — ex- 

 periments on the generation of air from water, Ibid, to p. 20. 

 not lefs pure in towns than country, Vol. IV. p. 264. 



(fea and hind) experiments on. Vol. IV. p. 262, 266, 269. 



(rarified) explained, Vol. II. p. 2. 



(eleSricJ its capacity leifened by condenfation, but increafed by heat, 



Vol. II. p. 79. 

 y//> (phlogijlicjtedj. See Phlogift'icated. 



( dephlog'ijltcated ) , See Dephlog'i/licaled. 



(foul) how to expel it from wells. Vol. III. p. 324. 



(fea) thermometrical (late of, Vol. III. p. 90, 200. 



(Jixej) See Caroonic acid. 



(atmofpherical) experiments and obfcrvations relating to the analyfu 



of, Vol. IV. p. I. 



(nitrous) . See Nitrous. 



(Infldmmable). See Inflatnmable. 



Airs, Experiments and obfervations on various. Vol. IV. p. i to 11, 128, 



417, 452. See the Gafes. 

 Aldelaran (oceultation oi) as obferved in the city of Wafliington in 1793, 



Vol. IV. p. 48. 

 Allegany mountain (weft ofj the ftrata of ftone lie horizontally. Vol. IV. 



p. 227. 

 i barometrical meafurement of it, Vol. IV. p. 216. 



and Ohio rivers, &c. their fogs remarkably denfe but not unwholefome, 



Vol. IV. p. 225. 



Alphabet, how to form a univerfal one. Vol. III. p. 263 — the imperfeftion 

 of exifting alphabets, 263, 266 — a particular one conftrudcd and re- 

 commended, 277. 



Alder tree, agreeable food for filk worms. Vol. I. p. 226. 



America (North) qualities of its winds, Vol. I. Preface p. xviii. — compared in 

 places with China, Kamtfchatka, S:c. ibid. — obfervations on its vegeta- 

 ble Ymgdom, prcf. ibid. p. 250 — its grapes 192 — its minerals, Sic. pref. 

 xxii. p. 251 — the three bread colonies become very dry, 203 — its general 

 climate proper for the grape and making of wine, 117, 120 — directions 

 for the culture of the grape, 157 — medicinal produ(ftions of 235, 239, 

 250, 257, 258, 260, 262, 263, 264, 265, 266. [See Medicinal Pro- 

 du^ions'\ change of climate in the middle colonies, 272 — Indian popu- 

 lation below the falls, Vol. IV. p. 252. 



antiquities of. Vol. III. p. 214 — Vol. IV. p. 179, iSi, 185, 196, 



198, 203. 



, memoir on the difcovery of, Vol. II. p. 263. 



bodily diforders common in. Vol. III. p.. iii- — on the duration of hu- 

 man life in, and the population of, 25 — two births to one death there, 38 

 — inftances of longevity, 44 — obfervations on the Weftern country of, 

 214 — and on certain plants, and animals, 241. 



American Philofoph. Society, its rules, Vols. I and IV. p. iii — laws and regu 

 lations, Vols. I and II. p. v. Vol. IV. p. iii — names of officers and 

 members, Vol. I. p. xiii — Vol. II. p. xxiii — Vol. III. p. xxvlli — Vol. 

 IV. p. xiii — objeds of the inftitution, pre/, xlv. — aft of Incorpor.ation, 



Vol. 



