100 
the products of plants ; the morolyxic acid in a 
saline exudation from the white mulberry tree, and 
the kinic acid in a salt afforded by Peruvian bark *, 
but these two bodies have as yet been discovered in 
no other cases. The igasuric acid is so named by 
its discoverers, MM. Pelletier and Caventou : and 
the boletic, nanceic, fungic, and ellagic acids, have 
been described by M. Braconnot ; but their properties 
are too little interesting to the agriculturist to insert 
a description in this place. The phosphoric acid is 
found free in the onion ; and the phosphoric, sul- 
phuric, muriatic, and nitric acids, exist in many 
saline compounds in the vegetable kingdom ; but 
they cannot with propriety be considered as vege- 
table products. Other acids are produced during 
the combustion of vegetable compounds, or by the 
action of nitric acid upon them ; they are the cam- 
phoric acid, the mucous or saclactic acid, and the 
suberic acid ; the first of which is procured from 
camphor ; the second from gum or mucilage ; and 
the third from cork, by the action of nitric acid. 
From the experiments that have been made upon 
the vegetable acids, it appears that all of them, ex- 
cept the prussic acid, are constituted by different 
proportions of carbon, hydrogene, and oxygene : 
the prussic acid consists of carbon, azote, and 
hydrogene, with a little oxygene. The gallic acid 
contains more carbon than any of the other ve- 
getable acids. 
The following estimates of the composition of 
some of the vegetable acids have been made by 
Gay Lussac and Thenard. 
