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Rat Trap.

Description: Patent for a new and improved rat trap. This design consists of "the pendulum bait-frame, in combination with triggers and attached to cam-springs and weighted trap-doors and rollers" (lines 59-62).
Date: February 7, 1882
Creator: Younger, Henry
Partner: UNT Libraries Government Documents Department

Chain-Steamer.

Description: Patent for a chain steamer that has an improved means of propulsion with a uniform speed despite a changing current. It does not allow the boat to laterally deflect. It is especially meant to be used with tow boats that travel on fast-moving, shallow streams. It can be used to move ferry boats across fast-moving rivers as well.
Date: February 7, 1893
Creator: Pfeifer, Edmund I. & Pfeifer, Eduard A.
Partner: UNT Libraries Government Documents Department
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