The first picture of a Bilby portable steel tower under construction.
Bilby towers were made of prefabricated steel parts that could be reused.
These towers were designed by Jasper Bilby, chief signalman of the C&GS
Image ID: theb2520, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1927
Credit: C&GS Season's Report Bilby 1928
Category: Geodesy/Triangulation/Towers/Bilby Steel/
• High Resolution Photo Available
of the U.S. Department of Commerce, National Oceanic & Atmospheric
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April 30, 2013