Section 140. Workmen's compensation board

The workmen's compensation board
  in the department of labor is hereby continued. Such board shall consist
  of thirteen members, at least  four  of  whom  shall  be  attorneys  and
  counsellors-at-law  duly admitted to practice in this state. The members
  of the board shall be appointed by the governor, by and with the  advice
  and consent of the senate.  The members of the board in office, together
  with the additional members and the members appointed to fill vacancies,
  if  any,  at  the  time  this  section  takes  effect,  shall  continue,
  notwithstanding the appointment  of  any  of  the  members  for  a  term
  expiring on a different date, to hold office for terms to be assigned by
  the  governor by and with the advice and consent of the senate; two such
  terms to expire on December thirty-first, nineteen hundred fifty; two to
  expire on December thirty-first,  nineteen  hundred  fifty-one;  two  to
  expire  on  December  thirty-first,  nineteen  hundred fifty-two; two to
  expire on December thirty-first, nineteen hundred  fifty-three;  two  to
  expire  on  December  thirty-first,  nineteen hundred fifty-four; two to
  expire on December thirty-first, nineteen hundred fifty-five; and one to
  expire on December thirty-first, nineteen hundred fifty-six. The members
  next appointed, except to fill  a  vacancy  created  otherwise  than  by
  expiration  of  term,  shall  be appointed for terms of seven years. The
  governor shall designate one of the members of the board as chairman and
  another as vice-chairman.