Ps;r\f aliens,, frequent in the weftern country, Vol. III. p. 218. 

 (marinej intermixed with flint and limeftone at L. Erie, Vol. 



IV. p. 226. 

 P/V-«ca/ introduced into ufe in England, Vol. II. p. 19 — neglected in France, 



19, 20 — ufed in China, 33 — its iinoke deemed falubrious, 20. 

 Phenomena, Vol. I. p. 283, 285 — a fingular one explained, Vol. III. p. 13 — 



looming, 62 — in magnetifm the folution of, Vol. IV. p. 324. 

 attending the tranfit of Venus in 1769, Vol. I. p. 27, 28, 29, 



46, 49, 50, 94, 1 01, 106, 109, III, 115, appendix 12 to 20, 68. 

 of Mercury, Vol. I. p. 83. 



PbUadelphia compared with Pekin, Vol. I. pref. p. iv. — lat. of, Vol. I. p. 54 

 — Ion. of, 6, 59, 93, 96— difference between its meridian and that of 

 Greenwich, 59 — courfes and diftance from its obfervatory to that 

 of Newcaftle couvt-houfe, 92 — difference of its Ion. and lat. with thofe 

 of Norriton, app. ndix 5 — meteorological obfervations made there in 

 1770, p. I. appmdix 70. — births and deaths in, Vol. III. p. 37, 39, 

 44, 54, 56, 59 — its fize in 1683, p. 35. 



Plnhlog'iccd view of fome very ancient words in feveral languages, Vol. IV. 

 P- 47'5. 



Phikfophiial {bclety held at Philadelphia, their laws and regulations, Vol. I. 

 p. V. — Vol II. p. V. — Vol. IV. p. iii. — lift of the officers and members 

 Vol. I p. xiii. — Vol. II. p. xxiii. — Vol. III. p. xxviii. — Vol. IV. p. xiv. 

 — charter of incorporation. Vol. II. p. xi. — law to encreafe the de- 

 poflts and fubfcriptions of the members. Vol. II. p. xix — extraifts from 

 minutes concerning the Magellanic prize, ib. — Vol. IV. p. vii. — See 

 Am^rkan P. Sec 



Pklo^yion, obfer\'ations and experiments concerning. Vol. IV. p. i to 11 — 

 not a fimple fubflance, ib. p. 7 — how formed, ib. — farther obfervations 

 on it, p. II and 382 — confiderations thereon in oppofition to Dr. Prieft- 

 ley, p. 452. See /i-zotk gas. 



rejected, why. Vol. IV. p. 452. 



Phyftco-mathfmat'ical fubjefts recommended to tlie attention of Americans, 

 Vol. Ill p. xiii. 



Prague, fugar an antidote for. Vol. III. p. 75. 



Planet, how to determine the true place of one, in an elliptical orbit, direflly 

 from the mean anomaly, by converging feries, Vol. IV. p. 21. 

 ''lanets, their refpedtive diftances from the fun calculated. Vol. I. p. 62 — 

 Stuart's method of deducing tlieir parallaxes and diftances, 76. Their 

 parallaxes explained, 103 — method of calculating their eccentric ano- 

 maly. Vol. IV. p. 67. 



Plants and feeds, directions for fending them abroad. Vol. I. p. 266, 269, 



270. 

 — — (foreign) catalogue of fuch as merit attention in America, Vol. I. 



not originally natives of America, Vol. III. p. 241. 



— ; — (irypt' gamkk) obfervations on. Vol. Ill- p. 202 — their organs of 

 generation aflerted, 203 — how regenerated, ib. — various opinions on 



, the 



