GRAY, Andrew.

Inquire · Offered by Peter Harrington

Explanation of the Engravings of the Most Important Implements of Husbandry Used in Scotland. First edition, illustrating new agricultural technology with detailed plates and explanations. It includes designs for threshing machines driven by horses, water, or wind, all incorporating the new yoking system invented by Walter Samuel, which increased output by 20 percent and reduced wear on the machines by running smoothly without jerks (Walker, p. 54).

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