In vehicles, a swinging crossbar, to the ends of which other crossbars, or whiffletrees, are hung, to equalize the draught when two or three horses are used abreast.
... effort and time the old arrangement had required for one; but the threads were no better, and could be used only for woof, linen being required for warp. Arkwright's roller arrangement was an improvement upon Hargreaves'. It bettered the quality of the threads, making them evener, so that they could serve for warp as well as woof. Crompton's mule was another quantitative improvement, combining the excellences of both Hargreaves and Arkwright. One man could with this machinery work twenty-two hundred spindles, and ... — History of the United States, Volume 2 (of 6) • E. Benjamin Andrews
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