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Illustrated history of the United States mint : with short historical sketches and illustrations of the branch mints and assay offices, and a complete description of American coinage from the earliest period to the present time : the process of melting, refining, assaying, and coining gold and silver being fully described : with biographical sketches of the mint officers from its foundation to the present time : to which are added a glossary of mint terms and the latest official tables of the operations of the different Mints and Assay Offices, showing the annual products of the gold and silver in the United States and foreign countries, with monetary statistics of the world (1893)

Philadelphia : G.G. Evans · leaf 42

An illustration from Illustrated history of the United States mint : with short historical sketches and illustrations of the branch mints and assay offices, and a complete description of American coinage from the earliest period to the present time : the process of melting, refining, assaying, and coining gold and silver being fully described : with biographical sketches of the mint officers from its foundation to the present time : to which are added a glossary of mint terms and the latest official tables of the operations of the different Mints and Assay Offices, showing the annual products of the gold and silver in the United States and foreign countries, with monetary statistics of the world, 1893, leaf 42
29 THE UNITED STATES MINT. It is impossible to roll perfectly true. At times there will be a lump of hard gold, which will not be quite so much compressed as the rest. If the planchets were cut from this place, it would be heavier and more valuable than one cut from a thinner portion of the strip.… … Rolling Machine. Annealing Furnaces. These are in the same room, to the right facing the rollers. The gold and strips are placed in copper canisters, and then placed in the furnaces and heated to a red heat; silver strips being laid loosely in the furnace. When they become soft and pliable, they…

Mints -- United States · Coinage -- United States

Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.

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