alf an inch in diameter down to about the fineness of a lady's
hair. In certain branches of telephone work, such as line
construction, the existence of the several wire gauges or standards is
very likely to lead to confusion. Fortunately, however, so far as
magnet wire is concerned, the so-called Brown and Sharpe, or American,
wire gauge is almost universally employed in this country. The
abbreviations for this gauge are B.&S. or A.W.G.

TABLE III

Copper Wire Table

Giving weights, lengths, and resistances of wire @ 68 deg. F., of Matthiessen's
Standard Conductivity.

+-------+----------+----------+-----------------------+--------------------+-----------------------+
| | | | RESISTANCE | LENGTH | WEIGHT |
| A.W.G.| DIAMETER | AREA +-----------------------+--------------------+-----------------------+
| B.&S. | MILS | CIRCULAR | OHMS PER | OHMS PER | FEET PER | FEET PER| POUNDS PER |POUNDS PER|
| | | MILS | POUND | FOOT | POUND | OHM | FOOT | OHM |
+-------+----------+----------+-----------+-----------+----------+---------+------------+----------+
| 0000 | 460. | 211,600. |0.00007639 | 0.0000489 | 1.561 | 20,440. | 0.6405 | 13,090. |
| 000 | 409.6 | 167,800. |0.0001215 | 0.0000617 | 1.969 | 16,210. | 0.5080 | 8,232. |
| 00 | 364.8 | 133,100. |0.0001931 | 0.0000778 | 2.482 | 12,850. | 0.4028 | 5,177. |
| 0 | 324.9 | 105,500. |0.0003071 | 0.0000981 | 3.130 | 10,190. | 0.3195 | 3,256. |
+-------+----------+----------+-----------+-----------+----------+---------+------------+----------+
| 1 | 289.3 | 83,690. | 0.0004883 | 0.0001237 | 3.947 | 8,083. | 0.2533 | 2,048. |
| 2 | 257.6 | 66,370. | 0.0007765 | 0.0001560 | 4.977 | 6,410. | 0.2009 | 1,288. |
| 3 | 229.4 | 52,630. | 0.001235 | 0.0001967 | 6.276 | 5,084. | 0.1593 | 810.0 |
| 4 | 204.3 | 41,740. | 0.001963 | 0.0002480 | 7.914 | 4,031. | 0.1264 | 509.4 |
| 5 | 181.9 | 33,100. | 0.003122 | 0.0003128 | 9.980 | 3,197. | 0.1002 | 320.4 |
| 6 | 162.0 | 26,250. | 0.004963 | 0.0003944 | 12.58 | 2,535. | 0.07946 | 201.5 |
| 7 | 144.3 | 20,820. | 0.007892 | 0.0004973 | 15.87 | 2,011. | 0.06302 | 126.7 |
| 8 | 128.5 | 16,510. | 0.01255 | 0.0006271 | 20.01 | 1,5