Journal of the Franklin Institute, Philadelphia (PA), vol. 3, 1827, p. 130-133Mr. Maelzel has been for many years distinguished for his great mechanical skill. The Panharmonicon, which was formerly exhibited here, was made by him: he is likewise the inventor of the Metronome, an instrument by which the time in music is accurately measured; it is not unknown here, and is extensively used in Europe. He has also invented, an apparatus which is attached to a Piano Forte, by which any piece of music which is played on it, is at the same time correctly written out. His speaking figures are of his own make, and far excel the attempts of Von Kempelen, although the labors of the latter, were eminently successful.
