8d., on a piece of paper which he handed to the inspector who paid the amount to the cashier and returned with a receipt to second ... 12 ozs. and to be second grade sirloin. ... The meat was clearly marked as second grade by means of the figure 2 which was stamped upon it in scarlet. ... The real questions are, first, whether negligence may supply that element and second, whether second appellanta#39;sanbsp;...