335

Created 1888

DOUBLE REFLECTING CIRCLE

By Charles Townsend (British, 1833-1904). Signed "C.H. Townsend Patd. January 31,1888". In brass, with inset silver scale divided to 20 arc-minutes and twin silver 20 arc-second verniers. Two mirrors are independently mounted at the center of rotation, each with vernier arm and magnifier. The mirror arms can be adjusted manually or with tagent screws. Original pine box with additional lenses and accessories.
Circle diameter 10".

  • Provenance:
    Bill Wheeler, the Oar House, Portsmouth, New Hampshire.
    The Kelton Collection of Marine Art & Artifacts.
  • Exhibited:
    Pacific Asia Museum at U.S.C., Trade and Treasure Exhibition, 1987.

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February 24, 2022 9:30 AM EST
East Dennis, MA, US

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