ach side of the lever, c, is hinged a brace, e, ing William Scarlett, at Aurora, Illinois. For ditch plowing, two plows are arranged on one beam, as shown at E, and this beam is substituted for “(Tre the rear ends of these braces being hinged to the up- Mr. Wilkinson’s Letter. one of the beams in… … long spokes. It is a strik- cy, July 30, 1861, and ing evidence of the gen- further information in eral advance in knowledge of mechanical princi- relation to it may be obtained by addressing the in- c, is raised, the cross beams are all turned upon their ples, that no millwright of the present…
Internet Archive · Public domain (published before 1931). Free to use for anything.
