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Method of Treating Ores.

Description: Patent for "new and useful Improvements in methods of Treating Ores, of which the following is a specification. The present invention relates to a method of treating ores carrying gold and silver values in any form amenable to cyanid treatment or flotation" (lines 6-12).
Date: May 8, 1917
Creator: Friberger, Harry Louis
Partner: UNT Libraries Government Documents Department

Drafting-Tool.

Description: Patent for a drafting ruler that does not need to be turned end over end to be used.
Date: May 15, 1917
Creator: Faas, Walter
Partner: UNT Libraries Government Documents Department

Film-Winder for Cameras.

Description: Patent for a film-winder for cameras. This particular film-winder is designed so that the exact required amount of film is placed upon the lens of the camera.
Date: May 22, 1917
Creator: Mansfield, Clarence H.
Partner: UNT Libraries Government Documents Department

Collar Attachment

Description: Patent for a collar attachment to be used with fold down collars to provide a means to hold the collar closed, with illustrations.
Date: May 1, 1917
Creator: Allen, Joseph H.
Partner: UNT Libraries Government Documents Department
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