tening of the strings or of Boston, New York, and Chicago, which add materially a piano with the front of tbe case removed. H is the iron the support of the iron frame at its back, is entirely dispens- to the value of these instruments, rendering them capable of plate or frame, made strong enough… … wood. them in the wood. Some- Fig, 4. times the iron plate is extend- 3. The piano ed to cover the whole of the is easily and ex- the strings without any wood support at 1ts back, which is wooden frame, and in that actly tuned, and case has holes through which so left open for more perfect and tree…
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