IMPROVED PLOW STOCK.
Robert Weber, New Ulm, Texas.--In this invention, by loosening a nut,
the point of draft attachment may be raised and lowered to cause the
plow to work deeper or shallower in the ground, or turned to one or
the other side, to cause the plow to take or leave land, and may be
secured in place when adjusted by again tightening the nut.
Scientific American, Volume XXXVI., No. 8, February 24, 1877 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. · 第 64 / 203 题