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Vol. 86 July 18, 2026 No. 19

J. W. Crook

inventor of the Themodist

Biography

J. W. Crook is identified in an illustration caption as the inventor of the Themodist, a player-piano device dated 1900. The accompanying diagram shows the internal mechanism of the device, but no further biographical detail about Crook is given in the text.

Highlights

  • Invented the Themodist player-piano device, 1900

Source

Alfred Dolge, Pianos and Their Makers, Vol. I (1911), p. 161.

Public domain.

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