Manual of practical assaying, intended for the use of metallurgists, captains of mines, and assayers in general. With copious tables for the purpose of ascertaining in assays of gold and silver the precise amount, in ounces, penny weights, and grains of noble mental, contained in one ton of ore from a given quantity. By John Mitchell 1854 [LeatherBound]
Mitchell, John, F.C.S.
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