The contents of a promissory note or other commercial instrument or chose in action means the specific sum named therein and payable by the terms of the Instrument. Trading Co. v. Morrison, 178 U. S. 202, 20 Sup. Ct. 869, 44 L. Ed. 1001; Sere v. Pitot, 6 Crauch, 335, 3 L. Ed. 240; Simons v. Paper Co. (C. C.) 33 Fed. 195; Barney v. Bank, 2 Fed. Cas. 894 ; Corbin v. Black Hawk County, 105 U. S. 659, 26 L. Ed. 1136.