antimony - Sciencemadness.org

THE METALLURGY OK ANTIMONY.
The inferior cupola also communicates with a kind of grated
hopper, K, two surfaces of which consist of inclined bars and two
Fia. 43.
of inclined masonry The finished scoria passes into this, and then
through the movable register, m, into the waggon, n.
The parts p, q, r are enlarged by the corbelling out of the bricks,
FIG. 44.
and are more or less inclined inward towards each cupola; they form
a surface of about 4 metres square, and are destined to receive the
dust ore, which is melted by the heat, falls into the cupolas drop by
drop, and, on meeting the hot air coming into the cupola through
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