Section 60. There shall be paid by the commonwealth to the secretary of said board a salary of six hundred and twenty-five dollars and his necessary traveling expenses actually incurred in attending to the necessary work of the board, and to each of the other members of the board a salary of two hundred and fifty dollars, and his necessary traveling expenses actually incurred in attending the meetings thereof, and such other expenses of the board as are incurred under section fifty-nine and under sections eighty-seven FFF to eighty-seven OOO, inclusive, of chapter one hundred and twelve.