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February 13, 2012

Victorian slide rule

Filed under: Item of the Day — Lizzie Ehrenhalt @ 9:30 am

Victorian slide rule

Cylindrical slide rule in a mahogany box with a hinged lid.  Designed by engineer Edwin Thacher (1839-1920) and patented in 1881. Manufactured by Keuffel & Esser Company; used by the Northern Pacific Railway.

For details, view the slide rule in our online collections database.

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One Response to “Victorian slide rule”

  1. Master Mercenary Says:

    This would have really come in handy for my taxes…

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