Spon, Ernest, Haldane, Robert, Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 · London ; New York : E. & F.N. Spon · leaf 442
to 40/. worth of silver per ton ; of excellent quality, this is ne.xt freed of antimony by calci- The sublimation furnace for the re- nation in a sublimation furnace ; and the moval of the antimony consists of a silver-lead alloy is finally cupelled on cast-iron bath 13 ft. long, 5 ft. 8 in. an… … dation, and inclosed by brick walls the hearth is built of trachytic rock, 10 in. high, over which an arch is and the shaft is of common brick with turned. At one end is a fireplace, the a fire-brick lining from the hearth up flames from which pass over a bridge to the throat ; a is the hearth or…
Workshop recipes · Technology · Industrial arts
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
