16 BULLETIN 321^ U. S. DEPAETMENT OF AGEICULTURE. 
that permanent inside fence constitutes on an average 35.3 per cent 
of the total farm fence, and that there is but 1.2 per cent of tempo- 
rary inside fence used. In many cases a considerable amount may 
be saved by the use of temporary instead of permanent interior 
fences. Figure 10 represents a farm of 160 acres Tvhich is fenced 
on the four sides with permanent fence. The farmstead and the 
lane are both inclosed by permanent fence. By eliminating the re- 
maining interior fences there are 474 rods less fence to maintain. 
The annual cost of maintaining 474 rods of a fair grade of woven 
wire having an investment cost of 65 cents per rod and lasting 15 
years is as follows : 
Cost of repairs at $0,024 per rod $11. 37 
Interest on average investment (total investment $308.10), $154.05, at 
5 per cent . 7. 70 
Depreciation, one-fifteentli of $308.10 20. 54 
Total 39. 61 
To maintain the necessary amount of temporary fence would re- 
quire a very small investment. Permanent and solid anchor posts 
should be placed along the lane and along the 
outside of the farm at the field divisions. 
This would require 14 anchor posts, 4 of 
which could be used in the permanent lane 
fence. They should not cost over $4 each for 
material and labor. There would be no de- 
preciation on posts of this kind if they are 
properly constructed. * Enough wire would be 
1 60 rds,. needed to fence in any field on the farm. This 
Fig. 10. would require not to exceed 160 rods of fence. 
If the fence is taken up at the end of the season and stored, it will 
not be subjected to as much corrosion by weathering, but it would 
probably become unserviceable as soon as permanent fence on account 
of being handled and stretched so often. It would probably be more 
desirable to use medium-weight wire for this purpose on account of 
the greater difficulty of handling the heavy wire. If heavy anchor 
posts are provided, it will not be necessary to place the line posts 
closer than 2 rods apart, as the wire can be stretched very tightly 
and should not become loose enough in one season to permit stock to 
get through it. Only a fair grade of posts would be needed to last 
as long as the wire. Such posts should cost not to exceed 20 cents 
each, or 10 cents per rod. The largest item of expense would be the 
labor. This should not exceed 8 cents per rod. A glance at Table 8 
(p. 30) would seem to indicate that this figure is liberal. The total 
approximate cost per rod of materials exclusive of anchor posts 
would be as follows : Woven wire, 28 cents ; posts, 10 cents ; barbed 
wire and staples, 4 cents; total, 42 cents per rod. Following is a 
summary of the cost of maintaining 160 rods of temporary fencing: 
