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The Miners Guide and Mettallurgist's Directory - p194
doi:10.1038/scientificamerican03101849-194f
Fall of the White Water Canal Culvert and Aqueduct - p194
doi:10.1038/scientificamerican03101849-194n
Back Volumes of the Scientific American - p197
doi:10.1038/scientificamerican03101849-197h
Refining Gold and Silver by Quicksilver - p200
doi:10.1038/scientificamerican03101849-200a