A wooden triangulation tower within a tower. Inner tower was to support the
instrument while the outer tower supported the observer.
Image ID: cgs00356, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Alaska, Between Anchorage and Fairbanks
Photo Date: 1923
Photographer: Mr. Oscar Risvold, USC&GS
Credit: Mr. Floyd Risvold, USC&GS
• High Resolution Photo Available