Coined money and such bank-notes or other paper money as are authorized by law aud do in fact circulate from hand to hand as the medium of exchange . Griswold v. Hepburn, 2 Duv. (Ky.) 33; Leonard v. State, 115 Ala. SO, 22 South. 504; Insurance Co. v. Keirou, 27 111. 505; Insurance Co. v. Ivupfer, 2S 111. 332, 81 Am. Dec. 284; Lackey v. Miller, 01 N. O. 20.