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System of Subirrigation.

Description: Patent for the improvement of a subirrigation system, which allows the prevention of the pipes being choked by pipes through the use of coiled pipes.
Date: January 23, 1912
Creator: Robinson, William M.
Partner: UNT Libraries Government Documents Department

Cut-Off.

Description: Patent for a cut-off for water pipes, which provides a new construction to control the flow of supply of water from a roof.
Date: February 27, 1912
Creator: Pruden, John B.
Partner: UNT Libraries Government Documents Department
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