C «« 1 
A N 
INDEX 
TO THE 
SEVENTY-SECOND VOLUME 
OF THE 
PHILOSOPHICAL TRANSACTIONS. 
A, 
ABERRATION of the fixed fiars. See Velocity of the Pays of Light. Take* 
Jil in its enlarged lenfe, depends on the relative velocities of light and of the tele- 
fcope, p. 59. 
Acids. See Saline Subfiance, Inflammable Air . 
Aerial acid. See Fixed Air. 
Andre (Mr. William). See Monoctdus Polyphemus. 
Angles. Two things necefiary for meafuring extremely fmall ones with accuracy, p. 85. 
Animal creation. See Vegetable Kingdom. 
Argillaceous bodies. Subject to a diminution of their bulk by fire, p. 30S. Gage for 
meafuring that diminution, p. 310. 
AttraBivc powers. See Saline Sul fiances. 
Aurora Borealis. See Eleftricity . 
Barber, Thomas. See Rain. 
Barometer. See Rain. 
Bernoulli • See Thermometer. 
N n n 2 
Bills 
