Vent-wire
The wire with which a moulder pierces sand, in order to form passageways for the escape of gases. Large ones should be made fast to a crutch-handle, and the entering end for an inch high increased about 1/16 inch in diameter and pointed. The point then pierces the sand easily, and forms a passage slightly larger than the wire; which follows with little effort, there being comparatively no friction. Smaller wires will enter very freely if the end be simply cut off square across and perceptibly enlarged by a slight jumping. See VENTING.