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Air-Compressing Apparatus.

Description: Patent for a new air compressing apparatus which employs two kinds of tanks called high pressure containers and low pressure containers charged by means of an air compressing engine.
Date: March 16, 1915
Creator: Gebhardt, William Charles
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Telltale Switch

Description: Patent for switch that indicates when a vacuum fails. Used for systems in "which it is desired to keep a ... uniform vacuum such as in fruit dryers, creosoting plants, surgace and jet condensing for steam plants and the like" (lines 21-25).
Date: March 23, 1915
Creator: Howland, John
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

[Postcard to Mrs. F. Adler, July 16, 1915]

Description: Postcard to Mrs. F. Adler. The front of the postcard features a photograph of a man-made dam on a small lake, taken from down-stream. Trees surround the lake and dam on all sides, and there are large, rectangular stones piled up on the right side. A man in a light shirt and dark pants walks along the edge of the dam (where the water pours over the edge), going left.
Date: July 16, 1915
Item Type: Refine your search to only Postcard
Partner: Patrick Heath Public Library

[Postcard to Mrs. Fritz Adler, September 2, 1915]

Description: Postcard to Mrs. Fritz Adler, in San Antonio. The postcard features a photograph of the town, and some of the small farms surrounding the town, taken from a great distance. There are larger trees on the right left side of the town, and in the background, small bluffs are visible on the horizon.
Date: September 2, 1915
Item Type: Refine your search to only Postcard
Partner: Patrick Heath Public Library
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