MAKING COMMON FRAMING JOINTS 



71 



at right angles with that strung between the sides of the 

 other pair. 



53. Supplementary Instructions. In the instruc- 

 tions for the seed tester, two operations in which the 

 chisel is a principal tool are not fully 

 described, viz. (a) paring a broad 

 surface and (6) cutting a mortise. 

 Examples of the former are found in 

 the body of the saw horse, where a re- 



FIG. 104. Making the 

 joints for saw horse. 



FIG. 105. Method of chiseling 

 joints. 



FIG. 106. Layout of joint 

 for milking stool. 



cess for the leg is formed, or in the upright of the harness 

 clamp, where supporting surfaces for the barrel staves are 

 formed ; while the latter is used in working out and cutting a 

 mortise and tenon for the joint in the milking stool. 



54. Special Operations. After the recess for the saw 

 horse leg is laid out in the body of the saw horse, and the 

 shoulders are cut with a crosscut-saw (Fig. 104), the waste 

 stock must be removed. Fig. 105 shows how the chisel is 

 used in taking paring cuts. The waste stock being removed, 

 the surface is finally tested with a try-square blade used as a 

 straight-edge to determine when the surface is perfectly true. 



To lay off the tenon on the top of the upright piece in the 

 milking stool, the try-square and single- or double-marking 

 gage should be used and lines drawn, as indicated in Fig. 106. 



Parallel lines can be made at one time with the double gage 

 (Fig. 107). The cross-hatched part of Fig. 106 represents the 



