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Scientific American, Vol. 51, No. 23 (December 1884) (1884)
leaf 4
firmly to the upper bridge. F is the upper bridge, a triangu the process of tuning this friction is lessened, just as the been shown. These pianos are, evidently, peculiarly iar piece of metal, tm wKich the strings rest, and are pro- hold of a round nail in wood is diminished by turning it adapted… … tested results which warrant them in tion of its strings, and tending to the extensive manufacture of their new make its tones dull and mixed with mere noise. upright pianos. Fig. 1.-MASON & HAMLIN'S IMPROVED UPRIGHT PIANO. © 1884 SCIENTIFIC AMERICAN, INCApparatus · Method · Manufacture · Gas · Iron · Valuable · Valuable paper · Articles marked · Steam engine · Scientific American · Papers contained · Sixteen large · Electric light · Valuable papers · Biographical sketch · Interesting paper
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