56 MEMOIRSofthe 
flream of water runs ; within this inclofure they fhovel their 
Calamine with the rell: of the impure and earthy parts, and thefe 
parts are carried away at the one end of the inclofure by the run- 
ning water, wliich comes in at the other, and the lead, the Cala- 
mine-i and the other heavier, ftony, and fparry parts are left be- 
hind ; and in order the better to clcanfe and huddle the CalamhWy 
whilft it is in this inclofure, they often turn it, that fo the water 
paffing thro', may wafli it the better , when they have thus 
waflied it as clean as they can, after raking up the bigger parts 
both of the lead and Calamine ^ they afterwards put the fmaller 
parts, that they may lofe none of their ore, into fieves made of 
ftrong wire at the bottom 3 and thefe fieves, with the Calamne^ 
lea,d, and the remainder of the earthy, fparry and flony parts, 
which the water could not wafh away, they often dip and ihake 
up and down in a great tub of watery and by this fhaking, the 
parts of the lead raixt with the Calamine fink or pitch down to 
the bottom of the fieves, as being heavieft 5 the parts of the Cala- 
mine remain in the middle, and the other fparry, flony and 
traHiy parts rife up to the top 5 which as they rife, they fkin off, 
and throw them amongft the reft of the rubbifti ^ and then they 
take off the Calamine^ and after that the lead : When they have 
thus cleanfed the Calamine^ as well as they can, in order to 
cleanfe it ftill farther, they are forced to fpread it on a board, 
and fo pick out the traih and ftones that remain 5 but all of 
it does not require h much trouble ; for fome rifes big enough 
out of the works to be cleanfed and picked fit for the calcin- 
ino oven, without all this charge and pains 5 and there are 
leveral loads of this great Calamine, which have no mixture of 
earth or trafh. 
After they have prepared th^'ir Calamine hy wafliing and pick- 
ing it, they then ca'iTy it to the oven, which is larger than a ba- 
ker's oven, but made much in the fame faftiion ; only the way 
of hearting, burning, or baking the Cala^nine is different 5 for it is 
not done in the fame manner as bread j but they caft in their 
coals into a hearth made on one fide of the oven, which is divided 
from the oven itfelf by a hem or partition, made open at the top, 
whereby the flame of the fire pafies over, and fo heats and bakes 
the Calamine-, they let it lie in the oven for the fpace of four or 
five hours, the fire burning all the while, according to the 
ftrength of the Calamine, fome being much ftronger than other 
fome, and fo requiring a longer time 5 and whilft it continues in 
the oven, they turn it feveral times with long iron coal-rakes 5 
and when it is fufticiently burnt, baked and dried, they beat it to 
a powder 
