Correspondence from John Hewston Jr to Professor J.C. Booth, the Melter Refiner of the U.S. Mint at Philadelphia. The letters
discuss the construction of the mint, supplies required to cast the gold, and the chemical and geological concerns of the
John Hewston Jr. was the assayer at the San Francisco Assaying and Refining Works. In 1856 he established the Laboratory for
Practical and Analytical Chemistry in connection with Kellogg and Humbert’s Assay Office. Later in his career, he was a brigadier
general of the California National Guard.
(1 volume containing 25 handwritten letters)
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Collection open for research.