Gregg, J. B. [from old catalog] · Ada, Ohio, The University herald press · leaf 67
Apparatus for Recording Vibrations. (3.) Fasten one end of a long spiral spring to a table; holdthe other firmly in the hand, and rake a small bar a short dis-tance along the coil. The student should make such observations as will enable him tounderstand thoroughly the questions to aid him in the…
Physics
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