172 A.2d 577 Sherin v. Dushac, Appellant. Supreme Court of Pennsylvania.May 22, 1961. July 17, 1961. Damages — Impairment of earning power — Evidence — Profits from small business — Hourly wages — Mortality tables. 1. In this action of trespass in which it appeared that the plaintiff was in the roofing and heating business […]