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Locomotive-Pedestal
Patent for a locomotive pedestal. Illustrations included.
Date:
January 3, 1911
Creator:
McCormick, George
System:
The Portal to Texas History
Focusing Device for Cameras
Patent for a focusing device for cameras. "In photographic cameras, the objective lens forms a reduced image which is thrown upon a plate of ground glass through which ground glass the image is observed" (lines 9-13). Illustration included.
Date:
January 31, 1911
Creator:
Grant, Adolphus S.
System:
The Portal to Texas History