49$ INDEX. 
and thermometer, p. 261 — 267. No repulfion be- 
tween air and water, p. 452. 
Mephitic Air. Vide Mephitic- 
Air-cells in birds. Vide Birds. 
Air pump, Mr. Smearon’s, fuperior to any made upon the 
common p]an, p. 95. 
Alexander , Dr. his opinion, refpecting putrid marfnes, 
refuted, p. 91. 
Altringham , number of inhabitants in, p. 61. 
Alum, native, found. in the coal-mines near Whitehaven, 
p. 489. Defcription of it, p. 490. 
Amber , not electrified barely by being heated, p. 421, 422. 
Anatomy , mi (takes of the antients in, to vyhat to be 
afcribed, p. 47 6. 
Anatomical experiments on birds, p. 211. 
Animals , in Labradore, not numerous, nor of great va- 
riety. The principal defcribed, p. 376 — 378. Am- 
phibious, their refpiratory organs of fimilar formation 
with thole in birds, p. 212. 
Anticofii , longitude of, p. 189. Latitude, p. 190. 
Clearnefs of its air, 193. 
Antients , too little deference paid to their learning, 
p. 447. 
Archipelago , a new one in the North, difcovered by the 
Ruffians, p. 461. 
Agronomical Obfer vat ions. By the miffionaries, at Pekin, 
p. 34. By Lieutenant Jofeph Varelaz, in Spain, p. 1 12. 
Near Quebec, p. 171. At the entrance of Gafpce 
Baffin, p. 177. At Kittery Point, and Portfmouth, 
in North America, p. 182, 183. At Greenwich, 
p. 184. On the ifland of Anticofii, p. 190. At 
Chiflehurft, p. 329. 
Atmofphere. How far it is true, that the denfity of the 
atmofphere, at a given elevation* is at all times pro- 
portional to the compreffive force, p. 245. Its infinite 
height more probable than the contrary fuppofition, 
p. 269. Its denfity finite at infinite heights, ibid. 
A table of its’gradual rarefactions, p. 272. How great 
a part of the whole rarefaction is performed on this fide 
