INDEX 
TO THE 
PHILOSOPHICAL TRANSACTIONS 
FOR THE YEAR 1815. 
A page 
Acid, on the nature and combinations of a newly discovered 
vegetable one ; with observations on the malic acid, and 
suggestions on the state in which acids may have previ- 
ously existed in vegetables, - - 23 1 
malic, observations on it, - - 248 
oxyiodic, a term proposed to be given to that which 
the compound of iodine and oxygene forms with water, 212 
prussic, analysis of it, - - 223 
sorbic, a term applied to a new one obtained from the 
berries of the Sorbus Aucuparia, - - 24 3 
Acids , on their action on the salts usually called hyperoxy- 
muriates, and on the gases produced from them, 214 
farther analytical experiments relative to the constitu- 
tion of the prussic, of the ferruretted chyazic, and of the 
sulphuretted chyazic ; and to that of their salts ; together 
with an application of the atomic theory to the analyses 
of those bodies, - - 220 
suggestions concerning the state in which they may 
previously have existed in vegetables, - 252 
Ancients , on the colours used by them in painting, - 97 
Aphrodita aculeata, its respiratory organs described, - 258 
Apoplexy, the excitability of the muscles of voluntary motion 
not impaired in that disease-, - - 81 
Atmosphere, on its dispersive power, and its effect on astro- 
nomical observations, - - - 375 
