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Improvement in Gang-Plows.
Patent for "a novel means of hanging the gang of plows beneath the draft-frame, in combination with levers and link-connections, whereby the plows can be adjusted to run at any desired depth, and firmly held after the adjustment." (Lines 18-23) Includes instructions and illustrations.
Date:
December 21, 1875
Creator:
McCormick, John R.
System:
The Portal to Texas History