A 
A N 
INDEX 
Fifty-Ninth VOLUME 
L -E, or white poplar, doubts about its being an 
inaigenous Englifh tree, p. 37. 
Achromatic telefcopes, required for fome nice aftronomical 
obfervations, p. 459. 
Acids ^ not the principal caufe of the fufpenfion of iron in 
medicated waters, p. 222, &c. 
Air^ its expulfion is probably the caufe of the lateral force 
of eleflrical explofions, p. 60, 61. Fixed, ferves to 
fufpend calcareous earths in water, p. 217. And like- 
wife iron, p. 218. &c. Has a greater affinity with al- 
kalies than with iron, p. 223. 
TO THE 
OF THE 
For the Year 1769 
A. 
VoL. LIX. 
U u u 
Almoor 
