View of two workers shaping special kinds of glass tubing at an unidentified factory. This photograph is one of a set of three stereographs detailing the production of glass tubing and pipettes.
“Shaping Special Kinds of Glass Tubing in a Great Factory.” Underwood & Underwood, n.d. Underwood & Underwood Stereographs of Manufacturing Industries. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/xk81jk36q.
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