How Pianola Works 1912
How the player-piano works - air passes through the holes in the piano-roll and acts on the bellows mechanism, causing a hammer to strike a key
Picture No
13725285
Media ID
45393418
Size
3568px x 5003px
(3.0MB)
Credit
Mary Evans Picture Library
Source
unnamed artist in Mee's Popular Science, vol 1 page 82. Image digitally colourised
Date
1912
