153 A. 424 McDonald, Appellant, v. Levinson Steel Co. Supreme Court of Pennsylvania.October 7, 1930. November 24, 1930. Workmen’s compensation — Construction of Act of June 2, 1915, P. L. 736, article I, section 105, article II, section 203, and article III, section 302 (b) — Statutory employer — Principal contractor — Subcontractor — Owner […]