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General History Gallery: U.S. Bureau of Mines: Assay Lab
Bureau of Mines Assay Lab. JDCM 2006.06.040G.
This exhibition is a diorama of the fire assay lab that operated on Mayflower Island from the early 1950s until 1996. Check out the display panels explaining the assaying process used by the US Bureau of Mines to determine the content of gold in rock samples collected throughout the state.