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Improvement in Vehicle-Springs

Description: Patent for a newly designed vehicle spring that attached to the axle and features an auxiliary spring.
Date: May 22, 1877
Creator: Faber, Fredrick W.
Partner: UNT Libraries Government Documents Department

Improvement in Ground-Squirrel Exterminators.

Description: Patent for an "improved apparatus by means of which ground-squirrels and gophers can be destroyed in their holes, conveniently and effectively, and at small expense" (para. 4). The mechanism works by gassing underground vermin with sulphuric fumes.
Date: July 10, 1877
Creator: Dreyer, Henry
Partner: UNT Libraries Government Documents Department

Improvement in Railroad-Switches.

Description: Patent for a railway switch for wooden or iron railway-tracks.
Date: September 4, 1877
Creator: Harding, John W.
Partner: UNT Libraries Government Documents Department
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