pl23_cgs01663.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23cgs01663jpgDescription
Configuration of speeder used in leveling operations along railroad.
Credit
Mary Wood, Daughter of Harry Siple
Photographer
Harry Siple
Display Date
1920
Location
California, Southern
Category
Historic Coast & Geodetic Survey
NOAA Affiliation
USC&GS;