File:Britannica Pianoforte Allen Compensating Grand Piano.png

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Description
English: William Allen's compensating grand piano, 1820. The first complete metal framing system applied over the strings.
Date
Source Encyclopædia Britannica, 11th ed., Vol. 21, p. 570
Author William Allen
Permission
(Reusing this file)
Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

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9c7d4ec189678567b34ffdb475b7fe271f15ef79

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Date/TimeThumbnailDimensionsUserComment
current00:57, 27 August 2009Thumbnail for version as of 00:57, 27 August 2009559 × 1,027 (29 KB)Bob Burkhardt{{Information |Description={{en|1=William Allen's compensating grand piano, 1820. The first complete metal framing system applied over the strings.}} |Source=Encyclopædia Britannica, 11th ed., Vol. 21, p. 570 |Author=William Allen |Date=1820 |Permission=

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