© Science Museum / Science & Society Picture Library
The Pyrophone, a musical instrument in which the notes are produced by 'singing' flames. It was invented by Georges Frederic Kastner in 1869. In each of the glas tubes, which are of different lengths and dimensions, several jets of flame are arranged close together. When a key is depresed on the finger board, the jets in their corresponding glas tube are made to separate. This causes the sound to be emitted. When the key is released the jets are brought together again and the sound ceases. Lent by Henri Dunant (1828-1910), founder of the International Red Cros.