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Photographic Technology
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Kodak Collection
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Kodak
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sliderule
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exposure calculator
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exposure calculator; sliderule
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Rochester
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Rochester, Monroe county, New York state, United States
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Celluloid sliderule for x-ray exposure calcualtion. In slip case.
Eastman X-ray exposure rule
1919
Sliderule calculator for X-ray exposure determination.
Eastman X-Ray Exposure rule
1914-1924