The paling and wire fence is made a lawful fence; provided, that the fence is built upon good-sized, substantial posts, set firmly in the ground, not more than twelve feet (12') apart; and provided further, that there is firmly fastened upon these posts two (2) sets double-strand wire, one (1) near the top, the other near the bottom, into which there is woven substantial sawed or split palings, not less than three feet (3') long, with one (1) barbed wire one foot (1') above the paling, or four feet (4') without the wire, and not more than three inches (3") apart; but nothing in this section shall be construed as repealing any statute providing for lawful fences in this state.