A wooden triangulation tower within a tower

A wooden triangulation tower within a tower. Inner tower was to support the instrument while the outer tower supported the observer.

Photo Location: Alaska, Between Anchorage and Fairbanks
Photo Date: 1923

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Author: Mr. Oscar Risvold, USC&GS/Mr. Floyd Risvold, USC&GS/ NOAA

License: Public Domain Mark 1.0 (Public domain)

Small	373 x 640	30.32 KB
Original	1197 x 2055	212.37 KB

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Added On	16th October 2015
Viewed	9 viewed