Section 1. All silver bullion or coin brought for coinage to the Mint, in accordance with the said Mint-rules,

21. All silver bullion or coin brought for coinage to the Mint, in accordance with the said Mint-rules, shall be subject to a duty at the rate of two per cent. on the produce of such bullion or coin, and the amount of such duty shall be deducted from the return to be made to the proprietor. Charge for melting and cutting bullion.