Blowtube

·noun A Blowgun.

II. Blowtube ·noun A similar instrument, commonly of tin, used by boys for discharging paper wads and other light missiles.

III. Blowtube ·noun A long wrought iron tube, on the end of which the workman gathers a quantity of "metal" (melted glass), and through which he blows to expand or shape it;

— called also blowing tube, and blowpipe.