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Apparatus for Testing Errors of Refraction

Description: Patent for an eye testing device that has a movable lens, a measuring device for correction, and two different cards with test type on them which are fed into the machine during testing for astigmatism and myopia, presbyopia, and hyperopia to determine the level of correction needed in glasses.
Date: July 2, 1907
Creator: Bahn, Gustavus Adolphus
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Partner: UNT Libraries Government Documents Department

[NSSAR Proposed Amendments and Resolutions]

Description: A document outlining the proposed amendments to the NSSAR Constitution and Bylaws concerning membership eligibility, time requirements for officers and trustees, presidential duties, the introduction of new positions, adjustment of the standards for positions, and other changes to wording and organization.
Date: May 25, 2017
Creator: Sons of the American Revolution
Item Type: Refine your search to only Text
Partner: UNT Libraries Special Collections
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