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Improvement in Spark-Arresters.

Description: Patent for a new and useful Improvements in Spark-Arresters
Date: April 25, 1876
Creator: Liscow, Robert
Partner: UNT Libraries Government Documents Department

Improvement in Devices for Teaching Musical Transposition.

Description: Patent for an improvement in devices for teaching musical transposition. The invention in question is composed of a keyboard "with sliding instruments and scales" (1).
Date: April 25, 1876
Creator: Allison, Thomas J.
Partner: UNT Libraries Government Documents Department

Improvement in Automatic Fan

Description: Patent for improvement in automatic fans, specifically of a fan attached to a pendulum of a clock mechanism.
Date: April 25, 1876
Creator: Gollner, Ervin G. & Fretz, Emil
Partner: UNT Libraries Government Documents Department
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