. The Coach-makers' illustrated hand-book. Fig. 6 is an iron back bar. It has a carved center in place of a collar. The bar isflattened where the center carving is to be placed, and the center ornament is of metal,riveted to the bar. Among the many improvements of late, perhaps none have shownmore artistic taste than that displayed on back bars. The heavy carved wooden backbar has given place to those of iron of such a slender and delicate form as to awakena feeling of distrust as to their safety in the minds of those unacquainted with theirstrength. The cut shows but half of the THE HEI
. The Coach-makers' illustrated hand-book. Fig. 6 is an iron back bar. It has a carved center in place of a collar. The bar isflattened where the center carving is to be placed, and the center ornament is of metal,riveted to the bar. Among the many improvements of late, perhaps none have shownmore artistic taste than that displayed on back bars. The heavy carved wooden backbar has given place to those of iron of such a slender and delicate form as to awakena feeling of distrust as to their safety in the minds of those unacquainted with theirstrength. The cut shows but half of the THE HEIGHT OF WHEELS AND LINE OF DRAUGHT. 144 COACH-MAKERS ILLUSTRATED HAND-BOOK. The greatest power of draught is obtained by a horizontal, or a line in the sameheight with the breast of the horse; said line operating in a square angle of thediameter of the wheel. The height of the wheel depends, consequently, on the heightof the line of draught. It would require a seven foot wheel to bring the line of draught in a correspondingheight, or parallel with the ground. Suppose a horse, measuring 3^ feet to the properelevation, were to start the traces, then we could calculate how high, possibly, wecould raise our splinter bar, shaft or pole, to fetch the line of draught as near horizon-tal as possible; if a platform spring carriage, the height of spring and head block wouldgive us 3 feet to the point A, where, as a rule, the line of draught A D should beplaced. The proportion between front and hind wheel is generally 3| to 4. The actionof draught causes the axle arm to press against the f
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectcarriag, bookyear1875
