18 ELEMENTARY WOODWORKING 
the throat of the plane by a clamp (Fig. 22). The open-....... 
ing on the bottom of the plane through which the cut-. 
ting edge protrudes is called the mouth of the plane. 
Fic. 22. Sectional Views of Iron Plane 
9. Adjustment of Plane. There are two ways of adjust-...-: 
ing a modern iron plane,— by means of the set screw 8,,,,,.,,,, 
and of the lever J. 
