The Connecticut Agricultural Experiment Station shall be within the Department of Agriculture for administrative purposes only. The management of the Connecticut Agricultural Experiment Station shall be vested in a board of control, consisting of eight members, one of whom shall be the Commissioner of Agriculture or some person to be selected by him, one of whom shall be selected by the Board of Trustees of The University of Connecticut, one by the governing board of the Sheffield Scientific School and one by the Board of Trustees of Wesleyan University, and two of whom shall be appointed by the Governor. The Governor and the director of the station shall be, ex officio, members of said board of control. The members of the board shall continue in office for the term of three years from the first day of July next succeeding their appointment. Upon the death or resignation of a member of the board, the authority or institution by which such member was appointed shall fill the vacancy.