Category:Ships with box type boilers
Here be the ships with their boilers in-between the Flued boilers and the Cylindrical boilers. They acquired the route of the flames very similar to the latter, but without their stronger form, retaining the earlier outer shape. Also known as Rectangular boilers and Wagon-top boilers. The Martin or Cochrane boiler was a direct evolution of the Flued one, with adding vertical water tubes into the large fire passages, later ones had horizontal water return-tubes like on the Scotch boiler.