To fashion pieces of metal into a prescribed shape, weight, and degree of fineness, and stamp them with prescribed devices, by authority of government, in order that they may circulate as money. Legal Tender Cases, 12 Wall. 484, 20 L. Ed. 287 ; Thayer v. Hedges, 22 Ind. 301; Bank v. Van Dyck, 27 N. Y. 490; Borie v. Trott, 5 Phila. (Pa.) 403; Latham v. U. S., 1 Ct. CI. 154; Hague v. Powers, 39 Barb. (N. Y.) 400