The question in this case is that of the construction of section 402(c) of the revenue act of 1921, c. 136, 42 Stat. 227, 278, a provision similar to that of section 402(c) of the Revenue Act of 1918, c. 18, 40 Stat. 1057, 1097, which has already been construed by this Court, and, in this view, there being no question of the constitutional anthority of the Congress to impose prospectively a tax with respect to transfers or trusts of the sort here involved, the judgment of the United States Circuit Court of Appeals for the Seventh Circuit (43 F.(2d) 277) is reversed upon the authority of May v. Heiner, 281 U.S. 238, 50 S. Ct. 286, 74 L. Ed. 826, 67 A. L. R. 1244.