Fig. 21 shows a contrivance for setting the axles when cold, and consists of an iron bar A, 2 feet 1 inch long, and about 2 inches square at the fulcrum B. A hole is punched through the end to allow the screw C to go through; this hole to be oval, to allow the screw to move either way. At the end of this screw is an eye of sufficient size to go on to the axle-arm. In setting the axle the eye is slipped on to about the centre of the arm; the clevis, D, is placed on the bar A, near the end; the fulcrum, B, is placed at the shoulder, either on top or underneath, according as the axle may be required to set in or out. When the fulcrum is laid on top, a strip of harness leather should be placed on the axle bed, and on that, an iron E, of the shape of the axle bed, and on the end of this the fulcrum is placed; then by turning the screw the axle may be bent or set to any required pitch. [Illustration: Fig. 22.] [Illustration: Fig. 23.] The figure shows the two ways of doing this, one with the bar or lever on top and the other with the lever below. Figs. 22 and 23 show two improved forms of axles. [Illustration: Fig. 24.] Fig. 24 shows another variety of the axle-set. It consists of a bar hooked on to the axletree in two places. The bar is fastened by the clamp M, and fulcrum block F. The eyebolt, L, is hooked over the end of the spindle or arm, and the adjustment of the latter is accomplished by the screw, S, and the nuts J, K. WEIGHT OF ROUND IRON PER FOOT. --------------------+----------------------- Diameter. | Diameter. Inch. lbs. | Inch. lbs. | ¼ ·163 | 2⅜ 14·7 ⅜ ·368 | 2½ 16·3 ½ ·654 | 2⅝ 18·0 ⅝ 1·02 | 2¾ 19·7 ¾ 1·47 | 2⅞ 21·6 ⅞ 2·00 | 3 23·5 1 2·61 | 3⅛ 25·5 1⅛ 3·31 | 3¼ 27·6 1¼ 4·09 | 3⅜ 29·8 1⅜ 4·94 | 3½ 32·0 1½ 5·89 | 3⅝ 34·4 1⅝ 6·91 | 3¾ 36·8 1¾ 8·01 | 4 41·8 1⅞ 9·20 | 4¼ 47·2 2 10·4 | 4½ 53·0 2⅛ 11·8 | 5 65·4 2¼ 13·2 | --------------------+-----------------------