INDEX. 549 
Perch , crooked, found in a pool of Merioneth (hire, p. 504. 
Perch lefs prolific than tench, 286. 
Percival, Dr. Thomas, his experiments on the Peruvian 
Bark, p. 221. 
Perry , its acid, p. 503. 
Petit, Dr. found above three hundred thoufand eggs in 
a carp, p. 280. 
Phoenician medal, in the Earl of Morton’s collection, ex- 
plained by Mr. Swinton, p. 265. Probably ftruck at 
Tarfus, 269, 271, when the Parthians were mafte'rs of 
Cilicia, 274. 
Phosphorus , how beft rectified, p. 534. 
Pigott , Nathanael, Efquire, his observations of the fun’s 
eclipfe, Auguft 16, 1765, at Caen, p. 402. 
Pine tree, appearance of it on Mount Vefuvius, defcribed 
by Pliny, as a forerunner of an eruption, p. 194. 
Plants found about the Volga, p. 323, &c. 
Pleiades , appear to be a fyftem of ftars by themfelves, 
p. 251. 
Plymouth , meteorological diary of 1767 there, p. 446 — 
4 50. 
Pompefs Pillar, in Egypt, defcribed, p. 438. Its di- 
menfions, 439* Made of granite, 44 0, Rafted on 
a reverfed obelifk, covered with hieroglyphics, ibid. 
Probably ere&ed at the time, and to the honour, of 
Vefpafian, 441. 
Pontemafs. See Cattigara. 
Probability of any two or more ftars of the fame magni- 
tude, being within a certain diftance of one another, 
p. 243, &c. 
Ptolemy , his account of the navigation of the ancients in 
the Eaft Indies, p, 156. 
Quick-lime , neither quickens nor increafes the folubility of 
bark, p. 232. „ , . 
Rathbone - 
