UNT Libraries Government Documents Department - 2 Matching Results
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- 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.
- 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.