CUTTING TOOLS 



19 



Screw s lowers or raises the plane iron so that we 

 may take a thin or thiclv shaving, and lever / straightens 

 the iron, which is liable to project more on one side 

 than on the other, and will then take a shaving thicker 

 on one side than on the other. 



Before nsing the plane always examine it carefully. 

 Invert the tool, holding it toward the light with the 

 toe toward you, and glance along the bottom. If the 

 iron projects, observe wlietlier it is even, and if not, 

 move the lever until it is. For a thin shaving the cut- 

 ting edge should appear as a blacl^ line of uniform 

 thickness. For a heavy shaving turn the Ijrass screw 

 until the iron projects slightly. 



In using the plane avoid a stooping position. Stand 

 with the right side to the bencli and with the shoulders 

 thrown back. Let the pressure of the left hand be 

 greater at the beginning and that of 

 the right hand at the end of the stroke. 

 The tool should rest perfectly flat on 

 the wood from start to finish. 



10. The Jack Plane. The ordinary 

 plane iron has a straight edge, as shown 

 at a, Fig. 23, but when a large quantity 

 of wood is to be removed the iron is sharpened in 

 the shape shown at h. Tliis curved iron will cut out 

 the wood in hollows, leaving ridges between, and it 



Fir;. 2". Irons of 

 Smooth and Jack 

 Planes 



