contracts. A bank note resembles a common promissory note, issued by a bank or corporation authorized to act as a bank. It is in fact a promissory note, but such notes are not, for many purposes, to be considered as mere securities for money; but are treated as money, in the ordinary course and transactions of business, by the general consent of mankind and, on payment of them, when a receipt is required, the receipts are always given as for money, not as for securities or notes.