Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 190
all suchdisagreeable sounds we call noises; while anote, such as that yielded by a plucked guitarstring or by a flute, we at once recognize asmusical. A musical note is a continuous, uniform andpleasing sound ; while a noise is a shock, oran irregular succession of shocks, received bythe ear.… … Fig. 212. — Toothedwheels on a rotatint,machine. On hold-ing a card againstthe teeth a musicalsound is heard. The same result, with a rather more pleasing effect isobtained by sending a current of air through holes regularly._^^^^ spaced on a circle near the circumference ?^--S5^) o^ ^ rotating…
Physics
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