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Knight's Mechanical Encyclopedia (ed. Knight) 2 0 Browse Search
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Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
His instruments, called forte-pianos, were played by Bach at Frederick the Great's palace at Potsdam. Bach regarded them as too coarse, and preferred the clavichord, which was, as Forkel says in his Life of Bach, poor in tone, but on a small scale extremely flexible. After Silbermann came his pupil Stein, upon whose piano-fortes Mozart so loved to play (1777). Frederici, a fellow-pupil of Stein's, made the first square piano. The farther history of the piano introduces the name of Sebastian Erard of Strasburg, who invented the escapement, which effected precision in the stroke of the hammer. He died in 1831. Ignace Pleyel, another noted maker of pianos in Paris, died the same year. Zumpe made large numbers in England, 1766, and following years. The movement invented by Mason, an English clergyman, about 1755, is shown at B (Fig. 3686). a is the key rocking on a round bar and kept in place by a pin; d is the mallet with a hinge of vellum; f is the string on which rests the da