2 3 8 



ENGINEERING ON THE FARM 



by the United States Department of Agriculture in Bulletin 

 J2i give the life of a fence made of No. 9 wire as twenty- 

 one years, and of one made of 

 No. 12 wire as twelve years. 

 The same bulletin also cites 

 statistics to show that the 

 higher woven wire fences are 

 more durable than the lower 

 ones. These statistics would 

 indicate that the high heavy 

 woven-wire fence is more 

 economical than the narrow 

 light woven-wire fence, al- 

 though the light wire is 

 cheaper in first cost. 



Staples. With either 

 barbed wire or woven wire, 

 staples (Fig. 202) are used for 

 attaching the wire to the 

 posts. For hardwood posts 

 the length is i}i inches and 

 for soft wood i}4 inches, 

 although other sizes are 

 manufactured. Staples are 

 sold by the pound, the 

 number per pound varying 

 somewhat with the manu- 

 facturers. The following is 

 the approximate number 

 per pound: 



Fig. 201. Twenty-six-inch woven- 

 wire ribbon, with three barbed 

 wires above 



1-inch 128 



i^-inch 116 



1 34-inch 104 



1 3^-inch 89 



1 %-inch 78 



Staples should be driven at an angle with the grain so 



