mold-board

Jefferson's design of a plow mold-board as he described it in a letter to Sir John Sinclair in 1798.

Agricultural Implements and Machines in the Collection of the National Museum of History and Technology Smithsonian Studies in History and Technology, No. 17 John T. Schlebecker

Then, down the entire length of the ridge the cotton-planter had followed, its two little wheels straddling the row, while the small bull-tongue in front opened the shallow furrow for the linty, furry, white seeds to fall in and be covered immediately by the mold-board behind.

The Bishop of Cottontown A Story of the Southern Cotton Mills John Trotwood Moore

Another improvement, the substitution of chilled-iron for cast-steel in the mold-board of plows, lessened their cost considerably, and, it is said, doubled their durability.

Our Patent-System, and What We Owe to It 1878

He cleaned his mold-board, and swung his plow round, and then, with a “Whoa! haw!” and a pull upon the single line which Western plowmen use to guide their horses, he drew the team into their place, and set himself to watching the turning of the rich, fragrant black earth.

The end of the world 1872

The mold-board is welded to the land side, or cast in one piece with it, so that no brace or other connection is required between the mold-board and standard; secondly, the curved beam is attached to the heel of the land-side and supported by a brace, which is bolted to the middle portion of the latter, and arranged in such relation to the mold-board that a space is left between them, into which the trash will fall, and thus be drawn into the furrow and covered.

Scientific American, Volume XXXVI., No. 8, February 24, 1877 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. Various

Before I could tell him how sorry I was that the rock happened to be under his foot, he forestalled the expression of sympathy which he saw coming by adding: "After all, son, it ain't so powerful bad as a feller might think, specially in turnin 'over ground with a mold-board plow.

With Sabre and Scalpel. The Autobiography of a Soldier and Surgeon John Allan 1914