Extract from Thomas Jefferson to John Taylor

I have imagined and executed a mould-board which may be mathematically demonstrated to be perfect, as far as perfection depends on mathematical principles ... it is on the principle of two wedges combined at right angles, the first in the direct line of the furrow to raise the turf gradually, the other across the furrow to turn it over gradually. for both these purposes the wedge is the instrument of the least resistance.

PoC (DLC). Published in PTJ, 28:230–4.
Thomas Jefferson
John Taylor
Date Range
December 29, 1794
Quotes by and about Thomas Jefferson
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