As Hargreaves entered his cottage from this excursion to get yarn to keep his loom agoing, his wife, Jenny, accidentally upset the spindle, which, as was her wont, she was diligently using. Her husband noticed that the spindle, which was now thrown into an upright position, continued to revolve just as when horizontal, and that the thread was still spinning in his wife's hands. The idea immediately occurred to him, that it might be possible to connect a considerable number of upright spindles with the revolutions of one wheel, and thus multiply the power of each spinster. "_He contrived a frame in one part of which he placed eight rovings in a row, and in another part a row of eight spindles. The rovings, when extended to the spindles, passed between two horizontal bars of wood, forming a clasp which opened and shut somewhat like a parallel ruler. When pressed together this clasp held the threads fast; a certain portion of roving being extended from the spindles to the wooden clasp, the clasp was closed, and was then drawn along the horizontal frame to a considerable distance from the spindles, by which the threads were lengthened out and reduced to the proper tenuity; this was done with the spinner's left hand, and his right hand at the same time turned a wheel which caused the spindles to revolve rapidly, and thus the roving was spun into yarn. By returning the clasp to its first situation and letting down a piercer wire the yarn was wound upon the spindle._" The powers of Hargreaves' machine soon became known among his ignorant neighbors, notwithstanding his strenuous efforts to keep his admirable invention a secret, and these neighbors naturally enough concluded that a contrivance, which enabled one spinster to do the work of eight, would throw many people out of employment. A mob broke into his house and destroyed his machine. Hargreaves retired in disgust to Nottingham, where by means of the friendly assistance of one other person he was enabled to take out a patent for his invention, which he called in compliment to his industrious wife the "_Spinning-Jenny_." This invention gave a new impulse to the cotton manufacture, but had it been unaccompanied by other improvements, no purely cotton goods could have been made in England; because the yarn spun by the new jenny, like that previously spun by hand, was not fine enough nor hard enough to be used as warp, and linen or woollen threads had consequently to be employed for that purpose.