Fig. 29.

The plane-iron should be ground on the grindstone if nicked or rounded.

To grind the plane-iron it should be held in the hand as shown in [Fig. 32].

Fig. 30.

Fig. 31.

Apply the iron to the stone, as indicated by dotted line [A, Fig. 33]; then raise it until the proper angle is reached, a position indicated by full lines B.