[ 3*8 ] 
phibia; particularly on the means of diftinguifhing thofe ferpents which are 
venomous from thofe which are not fo, p. 21. Obfervations on the drynefs of the 
year 1788, p. 37. Obfervations on a comet, p. 1 51. Obfervations and experiments 
on eleCtricity, p. 263. Further obfervations relating to phlogiflon, p.289. 
Gvaria in women fubjedc to a gre2t variety of changes, p. 71. Many of thefe changes 
fimiiar to thofe which take place in other parts of the body, ibid. Ovaria in women 
have fome power within themfelves of taking on a procefs which is imitative of gene- 
ration, whhout any previous connexion with a male, p. 72. 
Ovarium, account of a particular change of firu&ure in the human, p. 71. Natural 
fuhflance of an ovarium changed into a fatty mafs intermixed with hair and teeth, 
' ibid. The growth of hair and teeth in the ovarium fuppofed by Dr. Tyfon to be 
a lufus nature, ibid, note* 
F. 
Pagba , productions of, p. 84. 
Paraghon , its foil rich, and abounding with paflure, p. 88. Its produ&ions, ibid*. 
Colder here at all feafons than at TafTefudon, p. 89. Iron flones found near Pa- 
raghon, and one fpring highly impregnated with this mineral, ibid. 
Phhgijhn , experiments relating to the doclrine of, p. 294. 
Pbofphonts after the afcenfion of it in dephlogifticated air, there is a confiderable quan- 
tity of fixed air in the refiduum, p. 16. 
Piazzi, R.ev. jofeph, refult of calculations of the obfervations made at various places of 
the eclipfe cf the fun, which happened June 3, 1788, p. 43. 
Point. A force adding at a given point may be refolved by an infinite number of ways 
into two, three, or more forces aiding at the fame point, either in the fame or dif- 
ferent planes with the given force and each other; and, vice verfd , any number cf 
inch forces acting in the fame or different planes may be reduced into one, p. 183. 
Example proving this affertion, ibid. See Problem . 
Points in electricity, experiments on the adtion of, pp. 281, 282. The effeCis of points 
depend on the remotenefs of their extremities from the other parts of the conductor, 
p. 282. k 
Portrait of a Gentoo boy, p. 156. 
Precipitate , per fe, yields no fixed air by heat, p. 12. 
Prejents , lift of, made to the Royal Society from November 1788 to July 1789^ 
p. 3 i 4 * , 
Prieftley , Rev. Dr. Jofeph, objections to the experiments and obfervations relating to 
the principle of acidity, the compofition of water, and phlogiflon, confidered ; with 
further experiments and obfervations on the fame fubjedt, p, 7, On the phlogifiica- 
tion 
