POL 
393 
a Knowledge 
of Mineral Exhalations, when 
applied to difcover the principles and proper- 
ties of mineral waters, the nature of burning 
fountains, and of thofe poifonous lakes which 
the antients called Averni Brownrigg 
— An account of fome poifonous fifh in the South 
Se s - - - Anderfon 
r An account of the American poifon called 
Ticunas - - Fontana 
Poland. A relation concerning the fal-gemme-mines 
in, - - Anon. 
Polarity. A paper about magnetifm, concerning 
the changing and fixing the polarity of a piece 
of iron ~ 7 % CJ 
— Extra# of a letter on giving magnetifm and 
polarity to brafs - - Aider on 
Pole. Letter concerning fome fuppofed alteration of 
the meridian line, which may affe# the decli- 
nation of the magnetic needle and the pole’ 
elevation - - Wallis 
— Obfervations on the elevation of the pole at 
Lifbon - - Carbone 
Obfervations on the meridian height of the 
fun, to inveftigate the elevation of the pole at 
Lifbon - - Carbone 
•— A propofal to make the poles of a globe of the 
heavens move in a circle round the poles of the 
ecliptic - - Latham 
A contrivance to' make the poles of the diurnal 
motion in a coe’eftial globe pafs round the 
poles of the ecliptic - Senex 
Pole Star. Letter concerning the drawing the 
meridian line by the pole ftar, and finding the 
hour by the fame - Gray 
Polygons. Theorems for making the folution of them 
as eafy as that of triangles by common trigo- 
nometry - - Lexei 
— Theorems concerning polygons, infcribing orcir- 
cumfcribing the circle, having the greateft or 
lead area, or greateft or leaft perimeter Horjley 
Polynomium. A demonftration of the binomial 
theorem of Sir Ifaae Newton Coflilllmeus 
Polypodium. Obfervations on the feed vefTels and 
feeds of polypsodium - Leeuwenhoek 
Polypus (Difeafe) An account of a polypus found in 
Dddz 
Tranf. 
Abridg. 
LV 236 
LX VI 544 
* 
[ 
LXX 163 
V 1099 
n 5 2 4 
XVIII 257 
— 603 
L 774 
XXI 285 
XXXIV 92 
I 265 
— ’ 95 
•H 
XL 201 
VIII 217 
— 203 
— 
XXII 815 
IV 462 
LXV 281 
~ 301 
XLII 91 
VIII 10 
XXIV 1868 
V 2 267 
the 
