Fig. 66.—Glidden Patent Steel “Thick Set.”

Fig. 67.—Glidden Patent Four-point.

Barb wire of nearly, if not quite all the popular kinds, is shipped from the factory on strong spools, each holding one hundred pounds in weight, or eighty rods in length. These spools are bored through the center to admit a stick or bar, which can be used as an axle in unreeling the wire. The following table shows the weight of wire required for fencing the respective areas named:

AreaLength of
Boundary.
Weight of Wire.
1 Strand.
Lbs.
3 Strand.
Lbs.
1 Acre 60 Rods.67202
5 Acres⅜ Mile.167400
10 Acres½ Mile.183548
20 Acres¾ Mile.273820
40 Acres1 Mile.3651095
80 Acres1 ½ Mile.5471642
160 Acres2 Miles.7302190

Fig. 68.—Brinkerhoff Steel Strap and Barb.

It will be observed that the larger the area enclosed, the smaller is the amount of fence required per acre. The cost of fence complete can be estimated by adding to the amount of wire indicated in the last column, the cost of sixty posts, and three and three-quarter pounds of staples, for every sixty rods. To ascertain the weight of wire required for any desired number of strands, multiply the figures of the first column of “weight of wire” by the number of strands proposed to be used.