The Alabama Polytechnic Institute, formerly called the Agricultural and Mechanical College, shall be under the management and control of a board of trustees, which shall consist of two members from the congressional district in which the institute is located, and one from each of the other congressional districts in the state, the state superintendent of education, and the governor, who shall be ex officio president of the board. The trustees shall be appointed by the governor, by and with the advice and consent of the senate, and shall hold office for a term of twelve years, and until their successors shall be appointed and qualified. The board shall be divided into three classes, as nearly equal as may be, so that one-third may be chosen quadrennially. Vacancies occurring in the office of trustees from death or resignation, and the vacancies regularly occurring in the year nineteen hundred and five shall be filled by the governor, and such appointee shall hold office until the next meeting of the legislature. Successors to those trustees whose terms expire in nineteen hundred and three shall hold office until nineteen hundred and eleven; successors to those whose terms expire in nineteen hundred and five shall hold office until nineteen hundred and fifteen; and successors to those whose terms expire in nineteen hundred and seven shall hold office until nineteen hundred and nineteen. No trustee shall receive any pay or emolument other than his actual expenses incurred in the discharge of his duties as such.