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NOAA Photo Library Image - cgs00690

Heliotrope and observing instrument at Station Gatacre (secondary triangulation. ) Heliotrope on four foot tripod.

Image ID: cgs00690, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Canada, Ontario, Manitoulin Island
Photo Date: 1904 July
Credit: NOAA Central Library Historical Imagery U.S. Lake Survey

High Resolution Photo Available





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Last Updated:
May 12, 2014