C 735 ) 
£ The Method, Manner and Order of the Tranf- 
mutation of Copper into Brafs, &c. By 
Thomas Povey, Ejfi brought into the Royal 
Society, of which he is a Fellow. 
WE have in the North parts of England much 
Copper, which places, though as they now 
lie, are barren and poor, might be rendred rich and ufe- 
ful, if a fiifficient Encouragement were given to the 
Digging and Raifing thereof, and the Poor thereabout 
might be put in a good way of Livelyhood, as well 
as ieveral other Advantages to be brought thereby to the 
Publick. 
The Calamine is digged out of certain Mines, of 
which there arc fever al in the Weft of England, (as^ ee g 
about Mendip, &c.) which lie about 20 Foot deep, asttefh?a&s^ 
Coals do, thence brought up by Sea. It is burnt or 
calcin'd in a Kiln or Oven made red hot, then ground 
to Powder, and lifted into the finenefs of Flower, and 
mixt with g* Charcoal, becaufe the Calamine is apt 
to be clammy, to clod, and not Co apt or capable of 
incorporating : Then they put about 7 /. of Calamine 
into a Melting Pot of about a Gallon Content, and about 
5 /. of the Copper uppermoft, the Calamine muft be 
mixt with as many Coles as will fill the Pot. This is 
let down with Tongs into a Wind- Furnace 8 foot deep, 
and remains 11 hours therein. They caft off not above 
twice in Twenty Four Hours, one Furnace holds Eight 
Pots. After melting it is caft into Plates or Lumps, 
Forty Five Pound of raw Calamine produces Thirty 
Pound burnt or calcinU 
Brajs: 
