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pl23_theb1636.jpg

Image

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Permalink

https://www.noaa.gov/media/digital-library-photo/pl23theb1636jpg

Description

Battery-powered electric signal lamp.Triangulation party of William M. Scaife

Credit

Family of Captain William M. Scaife, C&GS;

Display Date

1922

Location

Montana-Idaho

Collection

Historic Coast & Geodetic Survey

Geodesy

Triangulation

Heliotropes & Signal Lamps

Keywords

Geodesy

Triangulation

Lights

Electric