Photometer on 16-inch telescope

Photometer on 16-inch telescope

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200 x 259 10 kb B&W JPEG(on this page)
400 x 518 29 kb B&W JPEG
900 x 1164 136 kb B&W JPEG
900 x 1164 1.0 Mb B&W TIFF

An early picture of a photoelectric photometer, used for accurate measurements of the intensity of stars, mounted on a Kitt Peak 16-inch telescope (the only such 16-inch remaining on Kitt Peak used to be an exhibit at the Visitors' Center, but has now been stored).

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