USGS Multimedia Gallery
Description: Manufactured by Q-O-S Corporation, New York for the U.S. Army Corp of Engineers. Although originally designed for military reconnaissance work, this type of instrument was used for map reading of aerial photographs up to 8". Object ID: USGS-000235
Photographer: USGS Museum Staff , U.S. Geological Survey
Usage: This image is public domain/of free use unless otherwise stated. Please refer to the USGS Copyright section for how to credit the photo.
USGS Museum Collection
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