Galvanized Iron Wire-Cloth or Netting
comes in rolls, with either square or hexagonal mesh; in other words, the openings between the wires are in the form of a square, or are six-sided.
Fig. 23.—Temporary Frame of Cage.
Wire is numbered from the very heavy, No. 000, which is over a third of an inch in diameter, to No. 40, which is only .00725 of an inch in diameter. It is not very likely that you will use either of these wires, unless your collection includes some very large and strong beasts and some very small insects. The wires which you will probably need will be between No. 14 and No. 22. No. 14 is eighth-tenths of an inch in diameter, and No. 22 is a little more than two-tenths of an inch in diameter.