from The Century Dictionary.
- noun An obsolete type of steam-boiler the general form of which was spherical like that of a kettle, with a flat bottom over the fire.
Sorry, no etymologies found.
A small charcoal burner smoked in the stern, which heated a brass kettle-boiler, and was attached by gears and chains to a propeller facing the rear.
"Then buy _half_ a loaf," said I, wheeling about and resuming my walk, not without a good many hard epithets in return from my kettle-boiler.