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