INDEX. 497 
Bernard , Mr. on an explofion of air, in a coal-mine, in 
Yorkfhire, p. 217. 
Bird-catcher , could prognofticate when a Nightingale was 
coming info long, p. 276. 
Birds, on the Tinging of, d. 249. Their fiift found is 
called Chirp, ibid. The next, Call, p. 250. Their 
firft attempt to fing is to record, ibid. When per fed, 
are /aid to fing their fong round, p. 251. Their notes 
are no more innate than language in man, p. 252. 
Wild, do not fing above ten weeks in a year, p. 261. 
Sing all in the fame key, p. 267. Notes obferved inleverai 
fpecies, p. 268. Have no delicacy of fenfations, p. 271. 
Several that were taught to fpeak anciently, p. 272. 
How far they imitate, p. 27 6. Their comparative me- 
rits in Tinging reduced to a fcale, p. 282. How they 
firft came to have particular notes, p. 287. 
Black-cock , what is called his Snow-boots, p. 225. Is 
not torpid in winter, p. 226. Whether that of Hud- 
fon’s Bay is different from our Ptarmigan, p. 227. 
Ca'led, at Hudfon’s-Bay, the Willow-Paitridge, p. 229. 
Black Colour , in what proportion it grows hotter by the 
rays of the fun, p. 41. 
Blood , red, its conflituent particles, p 503. Can only be 
difcovered by the microfcope, p. 304. Whether glo- 
bules, p. 306. Are flat vehicles, p. 307. Of different 
fize in different animals, p. 308. Have a black fpot 
in the infide, p. 311. Break into feveral pieces by 
putrefadion, p. 320. Are not oily, p. 315. Are pre- 
ferved intire by means of the fait of the ferum, p. 317. 
Botany , brought back to England by the Saxons, p. 80. 
Traced there from the twelfth century, p. 8t. Culti- 
vated by Gerrard, before the end of the fixtecnth, p. 82* 
And by John Tradefcant, ibid. 
Brownece, a genus of American plants, exhibited by Mr. 
Bergius, p. 174, 175. A rare fpecies of it, called 
Mountain-rofe, more particularly defcribed, p. 175, 
1 76. 
Vol. LXIIL 
Ttt 
Britijh 
