"SEC. 9. That the Supreme Court and the courts of first instance of the Philippine Islands shall possess and exercise jurisdiction as heretofore provided, and such additional jurisdiction as shall hereafter be prescribed by the government of said islands, subject to the power of said Government to change the practice and method of procedure. The municipal courts of said islands shall possess and exercise jurisdiction as heretofore provided by the Philippine Commission, subject in all matters to such alteration and amendment as may be hereafter enacted by law, and the chief justice and associate justices of the Supreme Court shall hereafter be appointed by the President, by and with the advice and consent of the Senate, and shall receive the compensation heretofore prescribed by the commission until otherwise provided by Congress. The judges of the court of first instance shall be appointed by the civil governor, by and with the advice and consent of the Philippine Commission: Provided, That the admiralty jurisdiction of the Supreme Court and courts of first instance shall not be changed except by act of Congress."