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Apparatus for Calcining Plaster

Description: This patent is for an apparatus for calcining plaster of any kind. Or an apparatus that keeps clean the inner surface of a revoluble drum for ventilating the drum during the calcining operation. The apparatus also provides for easily removing the material after the completion of the cooking operation (Lawrence, 1902).
Date: unknown
Creator: Lawwrence, Ambrose
Partner: UNT Libraries Government Documents Department

Cotton-Press

Description: Patent for improvements in the construction of steam cotton presses using a change in the frame and use of hydraulic-pressure pumps to operate the press. The pumps are driven by steam
Date: October 15, 1889
Creator: Turnpaugh, James William
Partner: UNT Libraries Government Documents Department
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