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Improvement in the Manufacture of Fertilizers.
Patent for a process of treating waste animal matter from tallow-rendering factories with plaster-of-paris for use as fertilizer.
Date:
November 25, 1873
Creator:
Stevens, Hennell
System:
The Portal to Texas History
Improvement in Screw-Propulsion.
Patent for "a new and useful Improvement in Screw-Propellers and their adaptation to the hulls of vessels" (lines 4-6) including illustrations.
Date:
November 9, 1875
Creator:
Wilson, Joseph Erwin
System:
The Portal to Texas History