File:Britannica Free reed vibrator in Grenie's Organ Pipe.jpg
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Britannica_Free_reed_vibrator_in_Grenie's_Organ_Pipe.jpg (267 × 445 pixels, file size: 45 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 14:03, 20 May 2009 | 267 × 445 (45 KB) | Bob Burkhardt | {{Information |Description={{en|1=Drawing of an organ pipe fitted with a free reed vibrator.}} |Source=Encyclopædia Britannica, 11th ed., Vol. 11, p. 87 |Author=J. B. Blot |Date=published 1911 |Permission={{PD-Britannica}} |other_versions= }} Caption: |
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