File:Britannica Organ Backfall.png
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Britannica_Organ_Backfall.png (619 × 89 pixels, file size: 2 KB, MIME type: image/png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:20, 2 September 2009 | 619 × 89 (2 KB) | Bob Burkhardt | {{Information |Description={{en|1=Drawing of a "backfall" from a pipe organ: a narrow wooden lever turning on a pin which passes through its center}} |Source=Encyclopædia Britannica, 11th ed., Vol. 20, p. 260 |Author=Robert Holford Macdowall Bosanquet | |
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