File:Britannica Organ Roller Board.png
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Britannica_Organ_Roller_Board.png (610 × 386 pixels, file size: 8 KB, MIME type: image/png)
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:48, 2 September 2009 | 610 × 386 (8 KB) | Bob Burkhardt | {{Information |Description={{en|1=Drawing of a "roller board" from a pipe organ. A roller board is general mode of shifting movements sideways. The roller is a slip of wood, or a bit of metal tube, which turns on two pins inserted into its ends. It has |
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