The first picture of a completed Bilby tower.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;
3/18/2019 2:24:53 PM
Date: 1927
Credit: C&GS; Season's Report Bilby 1928
Location: Minnesota
Subject: Geodesy
Subject: Triangulation
Subject: Towers
Subject: Bilby Steel