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Improvement in Ventilators.

Description: Patent for improvement in ventilators which combines a bell-mouthed vane with white induction and black eduction pipes for the purpose of introducing fresh air and eliminating foul air from an enclosed area.
Date: December 21, 1875
Creator: Moyer, Alexander L.
Partner: UNT Libraries Government Documents Department

Improvement in Earth-Boring Apparatus.

Description: Patent for improvement in well-boring machines in which it can be “rapidly bore through earth or rock holes of any desired size or depth, for the purpose of procuring water.” (P. 1, lines 9-12) Illustration is included.
Date: November 21, 1876
Creator: Yarborough, William H.
Partner: UNT Libraries Government Documents Department
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