ae 
Io 
Davidfon, Mr. George, See Bark-Tree. 
De Galvez, M.le Comte. See Machiees Aéroftatiques. 
De la Place. See Air, Thermometers. Ni | 
Double and Triple Stars. See Herfchel. gk 
E, | | 
Edgworth, Richard Lovell, Efq. See Meteors. 
Electricity, its near connexion and analogy with meteors, p. 224—232. 
Englefield, Sir Henry C. Bart. See Algol. 
Evaporation, that it produces cold, and even ice, has been decidedly eftablifhed by expe- 
riments, p. 383. 
Expanfioa. See Thermometer. 
F, 
Falling Stars, obfervations made on them by diiferent perfons at diftant ftations, much te 
be withed for, p. 224. 
Fire-ball, a remarkable one feen all over England, p. 286. See Meteors. 
Fifbes. See Anarrichas Lupus. 
Fixed Air, is now known to be an acid, and capable of being abforbed by feveral fub- 
ftlances, p. 154. 
Fixed Stars, on the Means of difcovering the Diltance, Magnitude, &c. of the Fixed 
Stars, in confequence of the Diminution of the Velocity of their Light, in cafe fuch a 
Diminution fhould be found to take place in any of them, and fuch other Data 
fhould be procured from Obfervations, as would be farther neceffary for that Purpofe, 
by the rev. John Michell, B. D. p. 35. Rules relative to the above fubjec&t from Sir 
Ifaac Newton, with corollaries deduced therefrom, p. 36—57. ‘The figure, tab. JIL, 
explained, p. 38. et feq. The well-defined round difk of the fixed ftars, mentioned 
by Mr. Herfchel, is not a real difk, but only an optical appearance, p. 45. See Air. 
On a Method of defcribing the relative Pofitions and Magnitudes of the 
Fixed Stars; together with fome Aftronomical Obfervations, by the rev. Francis 
Wollafton, LL.B. p. 181. Reafon for fuppofing there may have been feveral changes 
among the fixed ftars, which we little fafpeét, ibid. Plan propofed to aftronomers for 
producing a Celettial Alas, far beyond any thing that has ever yet appeared, ibid. A 
method of difcovering variations, which when difcovered, or only furmifed, fhould 
be configned immediately to a more ftrict inveltigation, p. 182. Manner of pre- 
paring a telefcope for this purpofe, ibid. Card more fully to explain this method, ibid , 
See tab. V. fig. 1. Different ftars muaft fucceffively be made central when any fufpi- 
cion 


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