Section 149.

For each state hospital for the insane now existing, or hereafter established, there shall be a special board of directors, consisting of three members, who shall be appointed by the Governor, subject to confirmation by the Senate; such board, shall have the management of the hospital for which it is appointed, under the supervision and control of the general board of directors hereinafter constituted. The terms of the directors first appointed shall be two, four, and six years, respectively, and thereafter, upon the expiration of the term of a member, his successor shall be appointed for a term of six years.