Every seaman on a vessel of the United States shall be entitled to receive on demand from the master of the vessel to which he belongs one-half part of the wages which he shall have then earned at every port where such vessel, after the voyage has been commenced, shall load or deliver cargo before the voyage is ended and all stipulations in the contract to the contrary shall be void: _Provided_, Such a demand shall not be made before the expiration of, nor oftener than once in five days. Any failure on the part of the master to comply with this demand shall release the seaman from his contract and he shall be entitled to full payment of wages earned. And when the voyage is ended every such seaman shall be entitled to the remainder of the wages which shall then be due him, as provided in section forty-five hundred and twenty-nine of the Revised Statutes: _Provided further_, That notwithstanding any release signed by any seaman under section forty-five hundred and fifty-two of the Revised Statutes any court having jurisdiction may upon good cause shown set aside such release and take such action as justice shall require: _And provided further_, That this section shall apply to seamen on foreign vessels while in harbors of the United States, and the courts of the United States shall be open to such seamen for its enforcement. [This section shall not apply to fishing or whaling vessels or yachts—Dec. 21, 1898, sec. 26.] (R. S., 4530; Dec. 21, 1898; sec. 5; Mar. 4, 1915, sec. 4.) (Effective on American vessels beginning Nov. 4, 1915; on vessels of foreign nations not covered by treaties Mar. 4, 1916; on vessels of other foreign nations after termination of treaties.) Whenever the wages of any seaman are not paid within ten days after the time when the same ought to be paid according to the provisions of this Title [R. S., 4501-4613], or any dispute arises between the master and seamen touching wages, the district judge for the judicial district where the vessel is, or in case his residence be more than three miles from the place, or he be absent from the place of his residence, then, any judge or justice of the peace, or any commissioner of a district court, may summon the master of such vessel to appear before him, to show cause why process should not issue against such vessel, her tackle, apparel, and furniture, according to the course of admiralty courts, to answer for the wages. (R. S., 4546; May 28, 1896.)