Commonwealth v. Lehigh Valley Railroad , 104 Pa. 89 ( 1883 )
New Colonial Ice Co. v. Helvering , 54 S. Ct. 788 ( 1934 )
Helvering v. Northwest Steel Rolling Mills, Inc. , 61 S. Ct. 109 ( 1940 )
Burnet v. Sanford & Brooks Co. , 51 S. Ct. 150 ( 1931 )