200 



FARM MECHANICS 



Typewriters are so common that a hand-written let- 

 ter is seldom seen among business correspondence. A 

 busy farmer is not likely to acquire much speed with a 

 typewriter, but his son or daughter may. One great 



Figure 179. Design of Roof Truss Intended to Span a Farm Garage. 



Figure 180. Roof Pitches. Mow capacity of the different roof 

 pitches is given above the plates in figures. 



