. . . . "cylindrical boiler" . . . . . "double-ended boilers" . . . . . . . "Scotch marine boiler" . . . . "Scotch marine boiler" . . . . . . . . . . . . . . . "Scotch boiler" . . "double-ended" . . . . . . . . . "Scotch fired boiler" . . . . . . . . . . . . . "boilers" . . "Inglis" . . . . . . . . . . . "Scotch-type" . . . . "cylindrical" . . . "cylindrical boilers" . . . . . . . . . . . . . . . "four-cylindrical boilers" . . . . "Scotch type" . . . . . . . . . . . . "double-ended Scotch boilers" . . "marine boilers" . . "Cylindrical boilers" . . . . . . . . . . "Double-ended boilers" . . "Scotch marine" . . . . . "double ended Scotch boilers" . . . . . . . . . . . . . . . . . . . . "high pressure boiler" . . . . . "Scotch boilers" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Scotch boiler" . . . . . . . . . "scotch marine boiler" . . "Scotch" . . . .