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BILBY STEEL TOWERS
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Coast-Geodetic-Survey
Geodesy
Triangulation
Bilby Steel Towers
Geodesy
Early steel gas pipe tower built by the Lake Survey.
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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;
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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;
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Using Bilby towers for hydrographic signal on the Florida coast.Built by party off of HYDROGRAPHER
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Bonita tower in southwest Florida.Traverse party measuring distance in foreground.Party off of HYDROGRAPHER
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A 90-foot Bilby tower wrecked by a storm.Triangulation party of Earl O. Heaton
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Tower at Station Schnackenburg.
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Building Station Reid.Triangulation party of Paul A. Smith
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Power source for hoisting steel.Jack up truck and use fifth wheel.This could be dangerous - at least one leg broken by getting wrapped up.Safety modifications made to system after individual severely injured.Triangulation party of Paul A. Smith
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Preparing to dismantle Station Village Mills South Base.Triangulation party of Paul A. Smith
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Climbing the tower at Station Walting.On the Ohio-Indiana boundary.Triangulation party of H. C. Warwick
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Straightening steel - even the portable towers needed some maintenance.Triangulation party of C. D. Meaney
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A study in geometry - looking up a Bilby tower.Station South Bend, Louisiana.Triangulation Party of Eugene R. McCarthy
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50-foot Bilby tower in Nebraska or Montana.Triangulation party of Wilbur Porter
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Looking down from the top of a 50-foot tower.Triangulation party of Wilbur Porter
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Looking up the side of a 50-foot tower.Triangulation party of Wilbur Porter
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Tower with observing tent to shield the instrument from the wind.Triangulation party of Wilbur Porter
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Tower at Station Bowie.
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Collimating the inner tower at Station Winnie.Collimation involved placing the observing instrument directly over the mark.Triangulation party of Carl I. Aslakson
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Lightkeeper orienting lights for distant observers.Tower at Station Northome.Osborne at lights, Caouette recording, Tryon at tent.Triangulation party of Carl I. Aslakson
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