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Improvement in Spectacle-Frames.
Patent for "spectacle-frames in which the bows are turned into a coil near the points where they are connected to the lens-hoops for the purpose of forming spring-joints, instead of the ordinary pivot-joints." (Lines 6-10) Includes instructions and illustrations.
Date:
November 30, 1875
Creator:
Stewart, John W.
System:
The Portal to Texas History