Union Petroleum Co. v. Bliven Petroleum Co. , 72 Pa. 173 ( 1872 )
Venture Oil Co. v. Fretts , 152 Pa. 451 ( 1893 )
Bartley v. Phillips , 165 Pa. 325 ( 1895 )
Calhoon v. Neely , 201 Pa. 97 ( 1902 )