[ 435 3 
p. 
Saris, its longitude from Greenwich deduced from triangular meafurement, fuppofing 
the earth to he an ellipfoid, p. 236. 
Pearfon , Dr, on the compofition of Jameses powder, p. 317. 
Pbofphorus , not obtainable by palling marine acid through a compound of bones and 
charcoal, when red-hot, p. ,184. The attraftion of phofphorus and lime for vital a,r 
exceeds the attraftion of charcoal by a greater force than that arifing from the attrac- 
tion of marine acid for lime, ibid. 
Piftet, Mark Augufes, on the convenience of meafuring an arch of the meridian, and 
of the parallel of longitude, having the Obferva.ory of Geneva tor their common 
interfe&ion, p. io 6. 
Pores , capillary, water enters fugar by means of, p. it. Alcohol enters fugar Dy 
the fame means, ibid. The penetration of animal fubfences produced by the faculty 
of capillary pores, pi2. 
Pot-ajh , with fomc other alkaline fubftances produce drynefs, p. 4. 
Powder. See James's Powder. 
Prefents , lid of, p. 423. ^ 
Priejiley , Dr. on the decompofition of dephlogifticated and inflammable airs, p. 213^ 
Problems refpedling furvivorlhips, p. 248, 233, 256, 258, 261, 263, 263, 267, 269, 
272. Problems relating to angles, p.290, 291. 
Proportions, fundamental, for the conflrutfion of an hygrometer, p. 1. 
relating to infinite feries, p. 299, 300, 302, 303, 308, 309, 310, 311, 
3 12 , 3 I 4 * 
Puh'is antimonialis, experiments on, p. 349 * 
Qc 
Quicklime, pofleftes a great capacity for moifture, p. 4. 
R. 
Rain, abftraa of a regifler of, kept at Lyndon in Rutlandfhire, at South Lambeth in 
Surrey, and at Selbourn and Fyfield in Hamplhire, for the year 17S9, p- 89- A leis 
quantity of rain fell in the year 1788, than in any year fince 1750, p. 9c. 
Read, Mr. on atmofpheric ele&ricity, p. 183. 
Receipts for making fever powders, p. 346, 347. . . 
Rem, ell, Mr. on the rate of travelling, as performed by camels ; and its application, 
as a fcale, to the purpofes of geography, p. 129. 
Refults from a feries of experiments on hygrometry, p. 4 Is 
1. Fire, as caufe of heat, the only means of obtaining extreme dryne s, 1 1 
3 . Water, in its liquid ftate, the only means of determining the point of extreme 
moifture on the hygrometer, ibid, 
3 . No fibrous or vafcular fubfence, taken lengthwife, proper for the hygrometer, 
ibid ‘ 4. Light 
LIU 
