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 50
37 THE UNITED STATES MINT. and carried about a quarter of a revolution, during 'which the edge is compressed and forced up — the space between the wheel and the rim being a little less than the diameter of the plan- chet. This apparatus moves so nimbly that five hundred and sixty half-dimes can be… … PERFECTED COINING PRESS. room are the milling machines, and the massive, but delicate, coining presses, ten in number. Each of these is capable of coining from eighty to one hundred pieces a minute. Only the largest are used in making coins of large denominations. The arch is a solid piece of cast…
Mints -- United States · Coinage -- United States
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
