24 6 SOILS* MANURES* &c. 
feme proof of its more univerfal exiftence, 
which having come under the author’s 
immediate obfervation, he takes the liber¬ 
ty limply to mention ; at the fame time 
moft refpe&fully fubmitting its confidera- 
tion to thofe who may be better quali¬ 
fied to decide upon it. This plant, which 
is well known to be highly alkalefcent, 
and, for the purity of its falts, preferable 
to moft others, wherever it may have 
grown, if it be taken up at a proper 
time, while in a ftate of vegetation, and 
dried in an open airy fituation, defended 
from the heat of the fun and rain, nitrous 
particles will be formed, and abound in 
the fmall ftalks and fibres of the leaves, 
before any confiderable putrefa&ion can 
have taken place, to fuch a degree as even 
to deflagrate with explofion when the 
parts become heated red hot. 
3 
Vitriolic 
