The Mine, before it is Galcin'd being expofed to the Air, 
will moulder in pieces, and yield a Llqwor wh^teof Copperas 
may be made : buc being Calcin'd, is fit for Jlnm, As iong 
as it continues in the Earthy or in Water, ic remains a hard 
Stone. 
Sometimes a Liquor will iflTue out of the fide of the Mine, 
which by theheat of the Sun is turned into Natural ^km. 
The Mine is calcined with Cinders of iV^w C^/gCoal^Wood 
and Furzes. The Fire made about two feet and a half thickj 
two yards broad, and ten yards long. Betwixt every Fire^ 
are ftops made with wet Rubbift ; fo ihat any one or more of 
them may be kindled, without prejudice to the reft. 
After there are 8.or lo.yards tbicknefsof broken Mine laid 
OD this Fewel, and five or fix of them fo covered : Then they 
begin to kindle the Fires : and as the Fires rife towards the 
top) they ftill lay on frefli Mine. So that, to what heighs yoo 
can raife the Heap, which is oftentimes about twenty yards, 
the Fires, without any further help of Fewell, will burn to the 
cop, ftronger than at the fifl: kindling, fo long as any Sulphur 
remains in the Stones. 
In Calcining thefe Scones, the Wind many times doth hurf ^ 
by forcing the Fire in fome places coo quickly through the 
Mine, leaving ic black and half burnt ; and in others burning 
the Mine too much, leaving it Red. But where the Fire paf- 
feth fofcly and of its own accord, it leaves the Mine white^ 
which yields the beft andgreatcft quantity of Liquour* 
The Mine thus Calcin'd is piit into Pits of Water, fuppor- 
ted with Frames of Wood, and rammed on all fides with Clay 5 
about ten yards long, five yards broad,and five feet deep ; fet 
with a Current that turneth the Liquor into a Receptory, from 
whence it is pumped into another Pit of Mine. Sothat every 
Pit of Liquor, before ic comes to boy ling, is pumped into four 
feveral Pits of Mine ; and every Pit of Mine is fteeped in four 
feveralLiquours, before it be thrown away; thelaftPit beiog 
always frefli Mine. 
This Mine thus fteeped in each of the feveral Liquors twen- 
ty fourhours or thereabout , is of courfe, four days in paf- 
fing the four feveral Pits, from whence ihe Liquors pafs to the 
BoyiingvHoufe. 
The Water, or Virgin-Liquor ofc times gains, inihefirft 
6 Y z * Pit, 
