Thomas Jefferson Papers

From Thomas Jefferson to Harry Innes, 20 June 1806

Washington June 20. 06.

Dear Sir

Your favor of May 25. is duly recieved & I have to observe that I used the mouldboard you mention with the common bar share plough; nothing about it being changed but the mouldboard. I can assure you that the same horses, in my farm, would make a furrow with this mouldboard 2. I. deeper than they could with the common mouldboard, owing to the difference of resistance. adhering to the principle of the mouldboard I have since varied it’s form by giving it a sharp toe instead of a square one. the effect of this change is to shorten the plough about 6. inches. I inclose you a description of this change. Accept my salutations & assurances of great esteem & respect.

Th: Jefferson


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