The sudden birth and rapid development of mechanically perfect means for preparing and spinning fibres were due largely to the comparatively simple movements required to draw and twist the yarn, but in the loom no such problem was presented. Here the movements were complicated and varied, and the application of power to the manipulation of the delicate threads was not susceptible of sudden and successful solution. The warps, stretched in a sheet between two beams, had to be opened to form the shed, the shuttle had to be passed therethrough, the weft beaten to place, and means provided to feed the warp and to take up of the fabric an amount at each beat-up corresponding to the size of the weft. These were the movements necessary in the most simple kind of weaving, and though fully understood for many centuries, as evidenced by the Indian and Egyptian looms, and as embodied in hand machines of the seventeenth century, it was not till 1787 that they were clothed with the application of power. Even then the first embodiment did not emanate from the hands of a weaver or engineer, but from Dr. Cartwright, a clergyman in the church of England. It was not surprising that these looms failed of their expectations, for the shuttle would frequently get trapped in the shed, the driven power-lay would break out the warp threads, the take-up and let-off motions were not graduated to compensate for the decrease of the warp and increase of the cloth beams, resulting in thin and thick places in the cloth. But this application of power to the loom was the initial step in the industrial supremacy of the machine, which to-day works with the perfect cadence of an automaton. [Illustration: PLAIN POWER LOOM, 1840.] The first years of the present century were of unsurpassed activity in the inventive field. The spinners were putting forth more yarn than the hand-looms could use. It remained for the loom to keep pace with the times. Miller, in 1800, Todd and Horrocks in 1803, Johnston in 1807, Cotton in 1810, Taylor in 1815, and many others, concentrated their efforts to develop the plain power-loom; but the second decade of the present century saw the old hand-loom with its slow and cumbrous movements still mistress of the art.