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Various mufles and tools, used for assaying gold and silver
ARP07111_009631P

Various mufles and tools, used for assaying gold a...

Purification of silver in a muffle furnace
ARP07111_009666P

Purification of silver in a muffle furnace

Metallurgy : assay laboratory
ARP07111_009669P

Metallurgy : assay laboratory