The two rails supporting the tree perches are placed about 7 in. from the ends. Before they are fixed, however, the tree perches must be arranged. These should be cut from the limb of a leafless tree, in winter, in order to retain the bark. Suitable pieces may be prepared by cutting off badly placed twigs and fixing them where required. They are then put on the perch rails, employing the same joint as the rails and upright, but securing with a strong screw.

Fig. 112.—End Elevation of Aviary.

Fig. 113.

Fig. 114.

Figs. 113 and 114.—Details of Joint of Rails and Uprights for Aviary.

When all is ready, the perches are fixed in the framework (see [Figs. 115] and [116]), and narrow strips of ¼-in. board are fitted between the lower rails of the back and ends, to be faced with split stuff, put on diagonally as shown in [Figs. 111] and [112]. The best plan would be to take a sufficient quantity of material to the nearest sawmill to be divided by a circular or band saw; the material must be free from grit, or objections will be raised against cutting it.

A stain, made by thinning down brunswick black with turps, should be at hand to stain the wood before fixing on the split stuff, which is secured with fine panel pins.

Fig. 115.—Part Sectional Plan of Aviary.