C 3 21 3 
A N 
* ✓ 
INDEX 
TO THE 
SEVENTY-NINTH VOLUME 
OF THE 
P H I L O S O P H I CAL TRAN SAC TIONS. 
V . . . • 
A,. 
ACCOUNT of a bituminous lake or plain, in the ifland of Trinidad, p, 6 ,7*- 
Account of a particular change of ftru&ure in the human ovarium, p. 71. Account 
of a monfter of the human ipecies, p. 157* Account of a finking-in of the ground 
near Ketton, in Rutland, p. 164. 
' Acid) nitrous. A red heat not necelTary to the converfion of nitrous acid into pure air, 
p. 147. Volatile vitriolic acid contains the proper element of dephlogifticated air, p. 
292. Pruffian blue fuppofed to have acquired fomething that is of the nature of an 
acid, p. 298. Experiments on the produ&ion of nitrous acid and nitrous air, p. 
300. A relation fubfifls between nitrous acid and volatile alkali, ibid. Nitrous acid 
produced by a mixture of nitrous air and dephlogifticated air, p. 3 n. Vitriolic acid 
fuppofed to have a ftronger affinity to the inflammable principle than it has to phlo- 
gifticated air, p. 312. 
AHion of points in ele&ricity, experiments on, pp. 278, 281. 
Air % inflammable or dephlogifticated, when either of them is extra&ed from any fub» 
Ranee incontad with the other kind of air, fo that one of them is made to unite with 
the other in what may be called its na[mtjtate } the refult will be find air ; but if both* 
7 oft 
) 
