C 573 1 
tains no cauftic parts, as the barilla, and the common; 
potafhes prepared by burning wood and plants, or 
the falts thrown out by volcanoes commonly do j 
and therefore, it will be found to be much more ufeful 
for bleaching and waflaing linens, and for cleaning 
and fcowering cotton or woollen ftuffs, and for many 
other purpofes,^ than any other alkaline fait hitherto 
known, at the fame time that it will anfwer every pur- 
pofe for which the other kinds of the foffll alkali are 
employed 
When, this fait is to be ufed for making-rocheile or 
other neutral falts, or for wafhing or bleach- 
ing linen, it ought hrfl to be diflblved in pure water,, 
and the folution be allowed toftand for. fome time, till 
the reddilh or brown earth has all precipitated to the 
bottom, and then the pure liquor ought to be poured 
off, and what remains at the bottom be thrown into 
a filter ; for, if this precaution is not taken, the reddifh 
earth is in danger of giving a flight brown or reddifli 
colour to the neutral falts,, or to affedl the colour 
of the linen.. 
LI1.L 
