Opinion of the Supreme Court of the United States Together with the Separate and Dissenting Opinions in the Cases of James Walter Carter, Petitioner, V. Carter Coal Co., George L. Carter, as Vice President and a Director of Said Company, Et. Al., Guy T. Helvering Et Al., Petitioners, V. James Walter Carter Et Al., R.C. Tway Coal Co., Kentucky Cardinal Coal Corporation, Harlan-Wallins Coal Corporation, Et. Al., Petitioners, V. Selden R. Glenn, Individually and as Collector of Internal Revenue for the District of Kentucky, R.C. Tway Coal Co., R.C. Tway, President and Directors of R.C. Tway Coal Co., Et Al., Petitioners, V. C.H. Clark, Involving the Constitutionality of the Bituminous Coal Conservation Act of 1935 ...