View of a worker inserting sticks of dynamite into blasting holes at a rock salt mine in Kansas. This photograph is one of a set of six stereographs detailing the mining and production of salt.
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“Powder Man Charging Holes with Dynamite Sticks for Blasting in Rock Salt Mine, Kansas.” Underwood & Underwood, n.d. Underwood & Underwood Stereographs of Manufacturing Industries. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/4t64gn17g.
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