- The wrest plank is supported upon the outer terial. In ordinary pianos the sounding board sisting of four parts, by weight, of felspar in ends, B’, of the ribs, which at this point are is flat, and is strengthened with extra ribs. powder, four of white sand, four of carbonate The inventor has… … lished every week, including Oficial Copies of all the of the enamel, but was found highly injuri- all strength derived from that source, relying pass; resting upon the metal they are less PATENT CLAIMS. These Claims are published in ous. the Scrrnriric AMERICAN tn advance of all other pa- solely…
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