A text book of physics, for the use of students of science and engineering . Fig. 621.- -Two vibrations at right angles withfrequencies as 2 : 1. 676 SOUND CHAP. so

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A text book of physics, for the use of students of science and engineering . Fig. 621.- -Two vibrations at right angles withfrequencies as 2 : 1. 676 SOUND CHAP. so

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