496 INDEX. 
American Lakes , in the fame latitude -with the Cafpian 
Sea, p. 4. Produce fifih fit for making ifinglafi, p. 5. 
Anglefea , population of that ifiand, from 1590 to our 
time, p. 181. ConfiderabJy increafcd, p. 182, &c. 
Probable caufes of this increafe, p. 180. 
Arffurus, variation of its place, taken notice of by for- 
mer aftropomers, p. 94, 95. Afcertained by Mr. 
Hornfby, p. 103, &c. Thought the neareft ftar to our 
fyftem, p. 105. How to be employed in afcertaining 
the obliquity of the ecliptic, p. 106, &c. 
AriJlotl\ whether he was acquainted with the Lagopus ? 
p. 224. 
Agronomical Obfervations. By Mr. Wo Halloa, p. 67. 
Atmofphere , degrees of its humidity at different heights, 
p. 440. 
B. 
Bailly , Mr, on new methods of improving the theory of 
Jupiter’s fatellites, p. 185. Is author of a work on that 
planet, p. 186. His contrivances to meafure the 
diameters of the fatellites, and make the. obfervations 
of their eclipfes comparable, p. 188. Some notes on 
his paper by Dr. Horfley, p. 213, &c. 
Ball, of fire, feen burfting in a parlour, by two gentle- 
men who were ftruck and flunned by it, p. 234, 235. 
Seen by other people, p. 239. 
Barker , Mr. Thomas, his meteorological regiiler, for 
1772, p. 222, &c. 
Barrington , Hon. Daines, account of a foflil from Hamp- 
fhire, p. 171. Obfervations on the Lagopus or Ptar-* 
migan, p. 224. On the finging of birds, p. 249. 
Belts, in Jupiter, their appearances, p. 73, &c. 
Beluga , the fifh, from which moft of the ifinglafs is made 
in Ruffia, p. 7. 
Bergius, Mr. Peter Jonas, Defcription of a rare American 
plant, of the Browneas kind, p. 173, &c. 
Bernard , 
