2 Free Images of Hipp Chronoscopes

cc-zerofiles uploaded by daderotscientific instruments in the museum of science and industry (chicago)
Hipp Chronoscope, c. 1890, view 1 - Museum of Science and Industry (Chicago) - DSC06506
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Hipp Chronoscope, c. 1890, view 2 - Museum of Science and Industry (Chicago) - DSC06508
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