The making of a pianoforte in n, firstclftss factory, as traeed in the Scicutijic American, begins with the careftü seleetion and seasoning of many kinds of wood. Afttir the completion of the case comes the important work of plaeing the sounding-board in position. On the jiropèr cELspo'sitión ana gteÚíúg 'oí the bars depends the emiality of vibration so mnch dsired. Next, the case isvai"nished and polished by hand, being afterward taken to the stringing room, where only higbly-ekiUed workmen are employed. Finally, all tho parta aro adjusted, and the timer takes the instrument in hand. The iron frames requirecinvfal casting, and the wood nsed in tho "actions" is nsually seasoned ton years. Exact uniformity is ainicd nt throughout, for on tliat largely dependa the quality of" the piano. Some of the miichinery is as delicate as that for watchmaking.