146 A. 551 Johnston v. Cheyney, Appellant. Supreme Court of Pennsylvania.April 23, 1929. May 13, 1929. Negligence — Automobiles — Crossings — Pedestrian — Evidence — Competency — Knowledge of defendant as to crossing — Condition of brakes — Distance car ran after accident — Act of June 14, 1923, section 21, P. L. 718. […]