The said coroners shall have the power to appoint 2 night clerks, 1 stenographer, 1 property clerk, 2 morgue attendants and 2 investigators, whose salaries shall be fixed by the board of supervisors of such county and said salaries shall be paid in the same manner as the salaries of other county employes. The terms of office of the foregoing employes shall in all cases expire at the expiration of the terms of office of the coroners so appointing.