USGS Multimedia Gallery
Title: Expedition Alidade with Case
Description: The rectangular base (blade) features two different types of spirit levels and a trough compass. Manufactured by W. & L.E. Gurley, Troy, New York. Object ID: USGS-000328
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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