Composition and Acoustic Properties

USS Holland (Submarine Torpedo Boat # 1)
Caption: USS Holland (Submarine Torpedo Boat # 1)
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Composition and Acoustic Properties

To be cast from a composition of about 78 percent of best new Lake Superior copper and about 22 percent of new block tin. The casting to be homogeneous in character and free from internal stresses or strains which may cause the bell to crack. To possess full, clear, round, and far – reaching tones of keys indicated in table forming part of these specifications.

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