
4 0 c m
29cm
actual image size: 21cm x 32cm
Description
Colin Brown (1818-1896) devised and patented a voice harmonium incorporating the 'natural keyboard' in 1875. This was a musical instrument which had additional keys to allow a range of scales to be played in perfect intonation instead of the (slightly inaccurate) scale of equal temperament, which is the best that can be done with an ordinary keyboard.
Image Details
Image Ref.
10300751
© Science Museum / Science & Society Picture Library