[ io8; ] 
Northampton, the proportionable number of inhabitants that die there annually, p. 154. 
Nofe-gays in rooms, their bad effeft upon the air, p, 209. 
O, 
Oak-bark, why preferable for the purpofe of tanning, p. 113. How prepared, ibid* 
Odours , their effect upon air, p. 208, 209. 
Ooze , how prepared by the tanners, p. 1 14. 
Opium, its effeCl upon air, p. 208. 
Ordnance, Board of, their letter to Sir John Pringle, encloling an account of Mr. Wil- 
fon’s experiments on the nature and ufe of conductors, addreffed to his Majefty, 
p. 242. 
Ore . Chemical experiments and obfervations on lead ore, p. 863. See Lead Ore . 
Oxen, experiments on fome, relative to their heat, p. 23. 
P. 
Pah de vaud, the proportionable number of inhabitants that die there annually, p. 154. 
Pantheon, new experiments on the nature and ufe of conductors exhibited there, 
p. 245, See* 
Papers . Sundry papers relating to an accident from lightning at Purfleet, p. 232. 
See Lightning. 
Paris . Difference of the meridians of Paris and Leicefter, p. 1020. And of Paris 
and Greenwich, p. 1020, 1021. 
Parjley leaves, the effeCt of their effluvia upon air, p. 202. 
Partington, Mr. Miles, his account of a cure of a mufcular contraction by ele&ricity, 
p. 97—101. 
Pearl Diamond, a remarkable large Hone near Cape Town fo called, p. 103. Defcrip* 
tion of it, p. 103 — 105, 
Pendulums of clocks, glafs a ufefal fubftance for them, p. 446 — 452. 47 476. 
Penis , experiments on a live and dead one, relative to heat and cold, p. 13— 17, 
Pepper-mint leaves, the effeCt of their effluvia upon air, p. 202. 
Phyfical meafures . An effay on pyrometry and areometry, and on physical meafures in 
general, p. 419. See Pyrometry and Areometry* 
Picker/gill, Mr. Richard, his account of the track of the Ihip Lion from England to 
Davis’s Streights and Labradore, with obfervations for determining the longitude by 
fun and moon, and error of common reckoning ; alfo the variation of the compafs, 
and dip of the needle, as obferved during the voyage in 1776, p. 1 037. See Lion . 
Pigeons dung, tanners ley made from it, p. 114. 
Pigot, Nathaniel, efq. his aftronomical obfervations made in the Auftrian Netherlands 
in the years 1773, 1 774> and 1 775, p.637. S Agronomical Objervations . 
6X2 
Pinion * 
