pl23_theb2520.jpg
Description
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;
Credit
C&GS; Season's Report Bilby 1928
Display Date
1927
Location
Minnesota
Collection
Historic Coast & Geodetic Survey
Geodesy
Triangulation
Bilby Steel Towers
Keywords
Geodesy
Triangulation
Towers
Bilby Steel