INDEX. 
5^3 
I 5 e Po?\'gonIs area vcl perimetro maximis et minim's, Infcriptis circulo, vel circulura 
circumferibentibus, p. 301. Vide Pheorema i, ir. in. iin. v. vi. Theorems 
for the folution of polygons, p. 281, 282. 
Polypi. Remarks on their reproduftion and propagation, p. 231. 
Population, obfervations on the ftate of, inMancheller, and other adjacent plrces, p. 322. 
See Manch^er„ 
Pound, See Weights and Meafures, 
Prafepe et J/elli. See Cancer, 
Price, Rev, Dr. his obfervations on the difference between the duration of human 
Kfe In towns and in country parifhes and villages, p. 424. See Human life, 
Priejlley, Rev. Dr. his account of further difeoveries in air, p. 384. See 
PROBLEMS, mathematical. 
If the two legs of a fpherical triangle right-angled are given, to find the hypo- 
tenufe, one leg being fmall in comparifon of the other, p. 47 
Having the hypotenufe and one of the angles, to find the bafe, p, 476. 
Suppofing the fame things known as in the lafi, to find the perpendicuUr, when the 
hypotenufe is nearly a quadrant, p. 477. 
Suppofing a fpherical triangle, in which are given two fides, with the included an- 
gle, to find the third fide, p. 47 B. 
Suppofing the fame things given, to find either of the angles, p. 482, 
Phyjical, To find the time of defeent in a circular arc, p. aSpr 
Prognojlication, fcience of in its earliefi ftate, p. 182. How corrupted, ibid; 
Prognodics derived from the Sun, mofi; of all to be relied on according to the an» 
dents, p.. 182. Prognoftics derived from fixed liars. Ibid. 
Propagation, fingular propagation of fome fpecies of fea anemonies, p. 222 — 230. 
Pupy in Velay. St. Michael’s church there built on a rock of Lava Irecdata, p. 39, i 
R, 
Pain, a regular acceunt of what quantity fell in London during the year 1774,. p. 14®; 
164. An abridged view of It, p. 168.— At Lyndon, In Rutland, p. 199, 200.——— 
At Briftol,. p. 1 94.. 
Rameaux, a bafaltine hill In ^^elay, p. 1 3. See Bafaltes„ 
ReproduHion and propagation of certain animals, p. 230—23^. 
Richmond, in Yorkfhire, an account of, p. 329, 330. Births, deaths, and marriages 
there, for nine years, p. 329. 
Roebuck, Dr. his comparifon of the heat of London and Edinburgh, p. 459., Ste Hcat,^ 
Rome, average of deaths there for ten years, p. 329.. Account of its Inhabitants for ir. 
years, p. 445. 
Room, heated, Experiments and obfervations- in one, p. iii — 123. 463 — 409. 484'-.- 
494 - 
Ro£o^ 
