Minutes of the stated meeting February 1
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Article
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1956
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Elsevier Science
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English
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## Precise Evaluation of Spectacle Lenses With the aid of an instrument developed by the National Bureau of Standards, it is now possible to measure both central and marginal powers of a spectacle lens with accuracy. This instrument, known as the Spectacle Lens Tester, was designed by Dr. F. E. Wa