What is Vitascope?

Numerous instruments have been devised to determine the rate of vibration of different materials and structures, the most important being the vitascope, which has a revolvable cylinder, blackened with soot, and this being rotated at a certain speed, the stylus, which is attached to the vibrating body, in contact with the cylinder, will show the number per second, as well as the particular character of each oscillation.

Excerpt from:
Title: Practical Mechanics for Boys
Author: J. S. Zerbe

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