What is "blowing tube"

Blowtube \Blow"tube`\, n.

1. A blowgun.
   --Tylor.

2. A similar instrument, commonly of tin, used by boys for discharging paper wads and other light missiles.

3. (Glassmaking) 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.