| Summary: | jigging vbl n In this way [see 'jigging mill'] the fragments are gathered up, and nothing lost, and the finer copper particles are smelted. This 'jigged ore,' of the best quality, averages from ten to twelve per cent. of copper; inferior qualities from eight to ten per cent. Even the very slime formed in the course of washing the ore is utilized, and the richest of it yields four per cent. of copper. The poorer ores, together with the "jigged ore," are smelted before shipment and brought to a "regulus" of twenty to thirty per cent. PRINTED ITEM W. J. KIRWIN MAY 1972 JH MAY 1972 Used I and Sup Not Used 2 Withdrawn [see 'jigging mill'] jig v, jigging ground, jigging veil, jigging machine Checked by Jordyn Hughes on Wed 30 Sep 2015
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