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Clarence Dubach at Polar Star camp. At right, others examine the ruins of the Boarding House. Taken July 1967.
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Clarence Dubach examines a core sample with a hand lens. The photograph is dark, but it appears that he's in a barn possibly on his property.
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Tom Pearch looks through aladaide on a plane table, a common tool of surveyors, on New York Mountain looking south. Plane table surveying is a graphical method of survey in which the field observations and plotting are done simultaneously.