INDEX. 6Sg 
the Moon’s parallaxes in Solar Eclipfes demonftrated 
and extended, p. 437, &c. 
"Pennant^ Thomas. Elq-, account of two new tortoifes, 
p. 266. 
Perftan coins, bear the effigies of the kings, p. 352. 
Philippic^ its weight, p. 475, &c. 
Pigott^ Nathanael Efq-, his Meteorogical obfervations at 
Caen in Normandy, p. 274, &c. 
Points^ effefts of, in cauling a quick difeharge of eledlricity 
accounted for, p. 662. 
Pompeii^ buried ten or twelve feet deep, p. 3. Has felt the 
effedt of one eruption only, p. 4. Which was taral to 
many of its inhabitants, p. 4. Covered with a ftratum 
of pumice and burnt matter, and above that with two 
feet of good mould, p. 5. Its llreets were paved with 
lava, ibid. 
Pofitive eledlricity, how diftinguiffied from negative, p. 652, 
^ 53 - 
Pound, Roman, its divifion, p. 492. Its weight, 495. 
Pumice Ifone is marble and alaballer in its infant ftate, 
p. 48. Produced from bitumen, p. 49. 
Putrefadiicn, produces a volatile alkali, p. 333. Experi- 
ments made to afeertain it, p. 334, 335. 
Puzzolane, a fine burnt material, entering in the compo- 
fition of the Tufa, p. 7. A lime prepared by nature, 
p. 8. 
R- 
Rain, difference of its quantity at different heights obferved 
in North Wales, p. 294. That quantity depends upon 
the diftance Iropi the earth, andfcarcely upon ti;e heiglfc 
of places, p. apff 
Paper, Matthew, Efq-, on Greek and Roman coins, p 462. ' 
Rafpe, Mr. R. S. account of Bafalt-hills in Ruffia, p. 580. 
Rtekardfon, Dr. William, on the Aphides, p. 182. 
Rom.an Soldier’s pay, p. 519, &c. 
Tol. LXl. 4 T Sagittarius, 
