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Some Properties of a Fused Silica Tuning-Fork

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Abstract

The logarithmic decrement, the coefficient of damping, and the coefficient of stiffness of a fused silica tuning-fork were determined from data obtained from photographic records of the vibrations of the tuning-fork after it had been struck with a pianoforte hammer.

Several years ago the late Professor A. G. Webster exhibited a fused silica tuning-fork at a meeting of the National Academy of Sciences which aroused considerable interest among the physicists who examined it. Apparently very few fused silica tuning-forks have ever been made, and a review of the literature has failed to show any data on them. It seems desirable, therefore, to publish the observations which were obtained for the purpose of calculating some of the physical properties of Professor Webster’s tuning-fork, even after this lapse of time.

© 1929 Optical Society of America

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