INDEX. 
culating them, 310. A method for readily difcovering 
where the probability lies, 316. A further improve- 
ment of that rule, 320. 
F. 
F<eful<e, what city it was, and where fituated, p. 104. 106. 
Felton , Mr. F. R. S. concerning a fingular fpecies of 
wafps and locufts, p. 53. 
Fergufon James, F. R. S. the defcription of a fafe and eafy 
crane conftructed by him, p. 24. Of a hygrometer 
invented by him, 259. 
Fire , how noxious to perfons ill of the plague, p. 80. 
Flood , and ebb, the fun’s force to produce it, compared 
with his force at the earth’s center, p. 36. And with 
the lunar force, ibid. 
FoJJils , curious obfervations on, p. 39. See Behnnite. 
Friftions, how different kinds of, produce different forts 
of electricity, p. 85. 
G. . 
Ganglions of the nerves. Their ufes by James Johnftone, 
M. D. p. 177, A particular defcription of them, 178. 
Their probable ufes, 179. How this doCtrine is lup- 
ported, 1 8 1- The errors of anatomifts upon this fub- 
je£t, 183. 
Graham , Mr. his fedtor animadverted on, p. 352. 
Gravity , law of, how inveftigated by Sir Ifaac Newton, 
p. 29. How univerfal amongft all the great bodies of 
fyftem, 30. Why the different forces of gravity, in 
different latitudes, cannot be fettled by clocks, 38 
H. 
Hadley , John, his letter concerning a mummy, infpefled 
at London, p. 1, 
Halley 
