A N T I M O N Y : ITS HISTORY, CHEMISTRY, MINERALOGY ...

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THE METALLUKGY OF ANTIMONY.
horizontal flue running through the bridge lengthwise, the flue being
provided with a slide, and the chimney with a damper. The charge
for a furnace of such dimensions is 1200 to 1500 lbs., exclusive of
the fluxes.
FIG. 60.-—Section CD.
At Banya the bed is built of fire-clay 11 inches thick, well rammed
into an iron box 13 feet long by 8 feet 2 inches wide. A charge
consists of 10 cwts. only of the unrefined metal.
FIG. 61.—Section A B. 1 metre=3'28 feet.
At Milleschau, where the above-described furnace is in use, the
very impure antimony is refined first by soda and then by antimony
glass, while the purer sorts are refined by antimony glass alone.
The tetroxide of antimony used in making antimony glass is