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Automatic Alarm for Stem-Boilers.

Description: Patent for a new and useful automatic alarm for steam boilers, including instructions and illustrations.
Date: July 18, 1899
Creator: Prencel, Anthony M.
Partner: UNT Libraries Government Documents Department

Pyrometer.

Description: Patent for a new and useful pyrometers "in which the motive power is a column of metallic balls of high expansive quality inclosed in a metallic tube of less expansive power" (line 9 - 12).
Date: November 21, 1899
Creator: Von Koehring, Henry
Partner: UNT Libraries Government Documents Department
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