Journal of the Franklin Institute; devoted to science and the mechanic arts (1826)
Franklin Institute (Philadelphia, Pa.) · Oxford, Eng. [etc.] Pergamon Press [etc.] · leaf 732
ool for a quarter of anhour, and then charged with the ore, which is spread uniformly by an ironrake. The heat is maintained at incipient redness to avoid ihe fusion ofthe sulphuret, and ought to be lower, in proportion to the purity ofthe material, because its tendency to fuse is diminished by the… … Fig. 1.
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