The Negro Laborer: A Word to Him. E-book. Formato PDF William Hooper Councill   -  Forgotten Books, 2017  - 

Avoiding the consideration of the different attractions, we will glance at the mechanical means he goes through in planing. Standing with his two feet together, would it be possible for him to lift a shaving It would not, because the resisting force gen crated by the friction of the wedge-shaped iron in entering the woody fibers would be so great that this body, being unable to resist it, would be pushed outside the perpendicular line of gravi ty, and fall. To overcome this resistance he increases his base, and lowering the center of gravity of the body, leans forward and throws his weight on his left leg, with his right forming, as it were, a brace.