46 Wisconsin:and Missourt Lead Region. - 
Fig. 2. 
a, Cast iron plate in front of the fire. 
5 b, Cast iron blocks forming the sides and back of the fireplace, . 
c, Sloping hearth down which the melted lead runs into the pot. . 
d, Pot to catch the metal. his 
Across the whole fronf, © 6-2) 2°. o. AT feet GF inchem 
i Depth, Poe Ee Poke . ¥ > ‘ SSG AE at a 
Sie MRNA Ne re ies i ES 
woes, . pe ey 
aeeban * J home Ree : : : : Lo 5Q 
‘Height above hearth, ch Bo sek Pthog 
been- prepared by breaking it up either with a hammer or between 
a pair of cast iron rollers, into pieces about the size of pigeon’s 
eggs, and if mixed with much clay, it must also have been wash- 
ed in a stream of water. It is allowed to remain a few moments 
on the surface of the fire, while a part of the sulphur is burnt out 
and carried off, in part combined with the oxygen, supplied in 
large quantities by the blast, which comes in from behind through 
the fire. When the mass begins to melt and becomes consoli-_ 
dated, the head smelter with a long iron bar pries up the whole 
ody, working under the iron plate in front of the fire; he then 
finishes the operation by similar stirring above, and as he opens 
the mass the back-hand throws a handful of billets of wood under 
the whole, against the back wall and the tweer, and immediately 
adds more charcoal Se * : Boe 
the surface 
arid ie wn 
