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[Photograph of Parade Float]

Description: Photograph of a car decorated as a float in a parade. Two women are sitting in the front seats and one is sitting on a pedestal behind the front seats, with two little girls sitting in the back seats.
Date: unknown
Partner: Private Collection of T. B. Willis

Vacuum-Energized Make-and-Break Spark-Plug.

Description: Patent for a vacuum-energized make-and-break spark plug that "relates to new and useful improvements in ignition apparatus for internal combustion engines" (lines 16-18) including instructions and illustrations.
Date: June 4, 1918
Creator: Irwin, Herbert Glen
Partner: UNT Libraries Government Documents Department
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