22 



FARM MECHANICS 



draw shave, Figure 16, and shave horse, Figure 9. A 

 steel square having one 24-ineh blade and one 18-inch 

 is the best size. Such squares usually are heavy enough 

 to remain square after falling off the. bench forty or 

 fifty times. A good deal depends upon the quality of 

 the steel. 



Figure 16. Drawing-Knife with 

 wide blade for finishing straight 

 surfaces. 



Figure 17. Try-Square With Six-Inch Blade. Wood, brass and 

 steel are the proper materials for a try-square. A double marking 

 gauge for scribing mortises is also shown. 



Steel squares differ in the measuring marks, but the 

 kind to buy has one side spaced to sixteenths and the 

 other side to tenths or twelfths. The sixteenth^ inter- 

 est farmers generally, so that special attention should 

 be given this side of the square. The lumber rule on 

 some squares is useful, but the brace rules and mitre 

 calculations are not likely to interest farmers. 



