Whenever it shall appear to the governing body of any institution (not having a Royal Charter, nor established by nor acting under any Act of Parliament,) which has been established for any particular purpose or purposes that it is advisable to alter, extend, or abridge such purpose, or to amalgamate such institution, either wholly or partially, with any other institution or institutions, such governing body may submit the proposition to their members in a written or printed report, and may convene a special meeting for the consideration thereof according to the regulations of the institution; but no such proposition shall be carried into effect unless such report shall have been delivered or sent by post to every member ten days previous to the special meeting convened by the governing body for the consideration thereof, nor unless such proposition shall have been agreed to by the votes of three fifths of the members present at such meeting, and confirmed by the votes of three-fifths of the members present at a second special meeting convened by the governing body at an interval of one month after the former meeting.