treaty with other powers or with the United States opened to commerce, and to reside with their families and trade there, and to proceed at pleasure with their vessels and merchandise from any of these ports to any other of them. But said vessels shall not carry on a clandestine and fraudulent trade at other ports of China not declared to be legal, or along the coasts thereof; and any vessel under the American flag violating this provision, shall, with her cargo, be subject to confiscation to the Chinese Government; and any citizen of the United States who shall trade in any contraband article of merchandise shall be subject to be dealt with by the Chinese Government, without being entitled to any countenance or protection from that of the United States; and the United States will take measures to prevent their flag from being abused by the subjects of other nations as a cover for the violation of the laws of the empire.
ARTICLE XV.
Commerce at open ports.
At each of the ports open to commerce citizens of the United States shall be permitted to import from abroad, and sell, purchase and export all merchandise of which the importation or exportation is not prohibited by the laws of the empire. The tariff of duties to be paid Tariff of duties.
[See treaty of 1844, pp, 124-128.]
by citizens of the United States, on the export and import of goods from and into China, shall be the same as was agreed upon at the Treaty of Wanghia, except so far as it may be modified by treaties with other nations; it being expressly agreed that citizens of the [See Supplemental Convention, pp. 137-146.]
United States shall never pay higher duties than those paid by the most favored nation.
ARTICLE XVI.
Tonnage duties. Tonnage duties shall be paid on every merchant vessel belonging to the United States entering either of the open ports, at the rate of four mace per ton of forty cubic feet, if she be over one hundred and fifty tons burden, and one mace per ton of forty cubic feet, if she be of the burden of one hundred and fifty tons burden or under, according to the tonnage specified in the register, which, with her other papers, shall, on her arrival, be lodged with Ships' papers. the Consul, who shall report the same to the commissioner of customs. And if any vessel, having paid tonnage duty at one port, shall go to any other port to complete the disposal of her cargo, or, being in ballast, to purchase an entire or fill up an incomplete cargo, the Consul shall report the same to the commissioner of customs, who shall note on the port clearance that the tonnage duties have been paid, and report the circumstances to the collectors at the other custom-houses; in which case, the said vessel shall only pay duty on her cargo, and not be charged with tonnage duty a second time. The collectors of Beacons, light-houses, &c. customs at the open ports shall consult with the Consuls about the erection of beacons or light-houses, and where buoys and light-ships should be placed.
ARTICLE XVII.
Pilots, servants, &c. Citizens of the United States shall be allowed to engage pilots to take their vessels into port, and, when the lawful duties have all been paid, take them out of port. It shall be lawful for them to hire at pleasure servants, compradores, linguists, writers, laborers, seamen, and persons for whatever necessary service, with passage or cargo boats, for a reasonable compensation, to be agreed upon by the parties or determined by the consul.
ARTICLE XVIII.
Merchant vessels in port.
Whenever merchant vessels of the United States shall enter a port, the collector of customs shall, if he see fit, appoint custom-house officers to guard said vessels, who may live on board the ship or their own boats, at