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Description Sound vibrations of increasing frequencies
Date
Source Popular Science Monthly Volume 13
Author Unknown authorUnknown author
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current16:08, 3 August 2010Thumbnail for version as of 16:08, 3 August 20101,186 × 406 (21 KB)Ineuw {{Information |Description = Sound vibrations of increasing frequencies |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_13.djvu/62 |Date = 1878 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Category:

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