177 A. 518 Bartlinski v. Northumberland Mining Company, Appellant. Superior Court of Pennsylvania.October 22, 1934. March 13, 1935. Workmen’s compensation — Accident — Injury resulting from sprain — Unusual effort — Aggravation of existing ailment — Competency of expert to testify to acceleration of death — Evidence — Sufficiency. 1. An injury resulting from a […]