75 N.W.2d 243 HAROLD CLARK, appellant, v. R.D. UMBARGER, appellee. No. 48890.Supreme Court of Iowa. March 6, 1956. Rehearing Denied May 11, 1956. TRIAL: Jury question or directed verdict — doubt resolved in 1 favor of jury submission. Where doubt exists whether or not the question of contributory negligence should be submitted to the jury […]