A SYSTEM OF 
uniting at the fame time together, by which 
new compofitions are made^ that are called 
neutral falts, dr falia neutra, 
Thefe alcaline falts are^ 
SECT. CXXXVL 
. Fixed in the fire, Alcalia miner alia fixa. 
A. Alcali of the fea, or common fait, Alccdi 
falls communis^ proprie minerale diElumi 
j. Pure, Purum. 
This has nearly the fame qualities 
with the lixivious fait, which is pre- 
pared from the afhes of burnt vegeta- 
bles ; it' is the fame with the fal fod^^ 
or kelp, becaufe the kelp is nothing 
elfe than the afhes remaining after the 
burning of certain herbs that abound in 
common fait *, but which common fait, 
during the burning of thofe vegetablesjf 
has quitted its acid. 
This, 
5. Ferments with acids, and unites with 
them. 
2. Turns the fyrup of violets to a green 
colour. 
3. Precipitates fublimate mercury in an 
orange-colotired powder. 
'4. Unites with fat fubftances to make 
foap. 
5. Diflblves the filiceous earth in the 
fire, and makes glafs v/ith it, &c. 
It diftinguifhes itfelf from the fait of 
the pot-afhes, by the following pro- 
perties : that, 
6 , It fhoots eafily into prifmatical crif- 
tals, that 
