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Small Comparator

  • 1911

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Public Domain

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An "instrument intended for measuring spectra photographs, gratings, divided scales, or such objects which can be focused by the microscope and will allow rapid measurements of the highest possible accuracy." The design of this particular machine was suggested by Professor Edwin B. Frost of Yerkes Observatory.

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  • 23 cm H x 15 cm W
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Rights Public Domain Mark 1.0
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  • Courtesy of Science History Institute

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  • Page 25

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Wm. Gaertner & Company. “Small Comparator.” Instruments of Precision Laboratory Apparatus, M-L Catalog. Chicago, Illinois, 1911. https://digital.sciencehistory.org/works/j3860692c.

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