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![Operating a heliotrope in the western mountains geod1234.jpg Operating a heliotrope in the western mountains](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_geod1234.jpg?itok=NTiQiCdK)
Description
Operating a heliotrope in the western mountains.
Display Date
1880 ca.
Collection
Geodesy
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