rain than is raifed in vapour, fuppofing the whole a fur face of water, p. 254, The 
exhalation from the earth is about a fixth part of what defcends in rain, ibid. How 
the rain is collected and reftored to the fources from whence it came, p„ 254, 245. 
Annual fall of rain between Lancafhire and York fh ire, p. 255. Exceeds that at 
Liverpool, ibid. An experiment to afcertain whether the fad of evaporation, going 
on equally well in an exhauded receiver, was not an unfurmountable objection to 
that theory concerning evaporation which fuppofes a chemical folution of water in 
air, p. 25 Air is a chemical folvent of water, and a catife of its evaporation, 
p. 257. Heat is another caufe cf the evaporation of water, ibid. Water may exifc 
in air in three Hates, ibid. Remarks on thefe different Hates of water exiiling in air, 
p. 257 — 2:9. The degree of cold produced by the evaporation of aether under the 
receiver of an air-pump whilfi exhauding, p. 646 — 648. 
'Euclid, almoH all the geometrical reafonings of mathematicians are derived from him, 
P- 450. 
Evelyn, Mr. his advice of rubbing the Hems of trees to increafe their growth, put in 
pradice, p. 12. The defign anfwered, p, 12 — 14. 
Europeans , an account of their iirH meeting with the Bouteners, at the attack of Cooch 
Behar, p.467. Their great furprize at each other, p.467, 468. Boutaners, con- 
quered by the Europeans, fue for peace, p, 468. 
Exhalation . See Evaporation. 
Expanjion of quicldilver in the tubes of Mr. De Luc’s barometer, .refilling from the 
Saleve obfervations, p. 656 — 658. Experiments on the expanfion of quickfilver, 
p. 659 — 681. Rate of expanfon of a column of quickfilver in the tube of a baro- 
meter, p.682. Confrrudion and application of a table of equation, for the expan- 
iion of quickfilver in the tubes of barometers, p. 683—686. Experiments on the 
expansion of air in the manometer, p. 689—696. Thermometrical fpaces compared 
with thofe of the manometer, p. 697. Experiments for determining the adual ex- 
panfion of common air in the manometer, affeded by the heat of 212 0 , p. 698— 
715. Expanfion of the glafs tube and the fcale of the thermometers, their difference, 
p. 834. 
Experiments, proving thaf the eggs of the queen -bee are fecundated by the males, p. 
22 — 28. Eledrical experiments, p. 48 —55. 83 — 144. 388—400. Barometrical 
experiments, p. 401 — 449. 315 — 569. Experiments made with an air-pump, p. 
614 — 648. Experiments to obtain a rule for meafuring heights with the barometer, 
p. 653—788. Experiments to determine the boiling points of thermometers, p. 81S 
—833. 
F» 
Fair, The number of fair and froHy days in Bridol in the year 1776, p. 334. 
Farr, Dr. Samuel. Extrad of his meteorological journal for the year 1776, kept at 
BriftoJ, p. 353. See Meteorological 'Journal, 
5 R 2 FaJUng 
