po 1 N D E i 
bular logarithms of the obferved heights of the quick- 
filver ih the barometers, at the different ftations, p. 
161, 234. Of the equation for the difference of tem- 
perature of the quickfilver, p. 160, 225. A miftake 
of M. Dc Luc’s upon this fubje<ff, p. 164, 237. 
Quantity of this equation, p. 160, 238. Elegant 
method of applying it, p. 1 66, 240. An ambiguity 
which may -arife in levelling a large tra<ffc of even 
country by the barometer, how to be avoided, p. 241. 
' Equation for the temperature of the air, p. 162 — 160. 
244, 251, 253. M. De Luc’s rules for the measure- 
ment of heights reduced to Englifh fcales, p. 166, 
2 56 — 259. Barometer obferved to rife at the top of a 
hill, while it was falling at the bottom, and vice verfa , 
p. 277. Caufe of this phenomenon, p. 275. 
Barrington , Hon. Daines, of the Gillaroo trour, p. 116. 
Beni , Mr. his account of a woman enjoying the ufe of. 
her right arm, after the head of the os humeri was cut 
away, p. 353. 
Bills of Mortality , their great utility, p. 67. 
Birds have certain receptacles of air communicating with 
the lungs, p. 205. The opinion of their having no 
diaphragm, refuted, p. 207. Of the internal openings 
of their lungs, p. 208. Of the final caufe, p. 21 r. 
The great fimilarity between them and amphibious 
animals, in the formation of their refpiratory organs, 
accounted for, p. 213. 
Black , experiments on dying, p. 48. Vide Lime-water. 
Slight boiling preferable to trituration, p. 50. 
Blood , experiments made on its fenfible or chemical pro- 
perties rendered very uncertain, by its receiving an ad- 
mixture of. atmofpheric air, p. 347. 
Boiling water, variation of the point of, and the compa- 
rifon of thermometers, p. 220. 
Boiling-point on M. De Luc’s fcale, p. 162, 224. For- 
mula foi the variation of it, &c. p. 225 — 227. Ta- 
ble of equation of the boiling point, p. 294. 
Bolton , 
