al. 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 made high for that purpose. Tho two frames, The inventor has provided… … lished every week, including Official 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 Scientific American in advance of all other pa- solely…
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