A N 
INDEX 
TO THE 
Fifty.Fifth VOLUME 
OF THE 
Philofophical T^ranfaEiions. 
For the Year 1765. 
A. 
/JIR, various obfervanons concerning it, page 149. 
182, &c. does not become lefs elaftic by paffing 
through the lungs of an animal, 173. 
Alcyonium^ fee Sponges. 
JJlronomical obfervations, made at Vienna by Father 
Jofeph Liefganig, p. 130, 
Aimofphere^ feveral Phenomena of it accounted for, 
p. 1 60. 
B. 
Balance^ of a new conftrudion, for weighing, propofed, 
y y ■ Bara- 
p. 205. 
VoL. LV. 
