Patent for improvements in plows by using “a double-mold-board plow comprising a plow-point provided with a shank, whose reverse inclines are slightly convex from the upper end of the shank to the plow-point, in combination with two mold-boards that are concavo-convex in cross-section as well as in longitudinal or vertical section” (p. 2, lines 44-50). The described construction of plow would enable the plow to thoroughly broken up the soil. Illustration is included.