On this page about Assay office:
Assay offices are institutions setup to test the purity of precious metal items, to protect consumers.
, with the assistance of his pupil, Asa Gray. From 1853 he was chief assayer to the United States assay office, but he continued to take an interest in botanical teaching until his death. Torrey made...
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. Sheffield's Assay Office opened in 1773, and stamps precious metals with the city's crown mark. Sheffield.... The city also has a Lord Mayor. In the past, the Office of Mayor had very considerable authority... carried out many of the duties later attached to the office of Town Clerk, and as well as presiding...