Section 73. Inspectors of locomotives

Inspectors shall be appointed by the
  commissioner  of  transportation,  who  shall  be  familiar   with   the
  construction and operation of steam locomotives and their appurtenances,
  whose  salaries  shall  be  fixed by the commissioner of transportation.
  They shall, under the direction of the commissioner  of  transportation,
  inspect  locomotives  used  by  corporations  operating  steam railroads
  within the state, or locomotives  owned  or  operated  by  corporations,
  partnerships  or  persons  on  or over any track adjacent to or parallel
  with any track of any railroad corporation within  the  state,  and  may
  cause  the same to be tested by hydrostatic tests and shall perform such
  other duties in connection with the inspection and test  of  locomotives
  as  the  commissioner  of  transportation shall direct. But this section
  shall not relieve any corporation, partnership or person from the duties
  imposed by the preceding section.