Leslie Stephen,
Dictionary of National Biography…
(1899)
“ WHEATSTONE, Sir CHARLES (1802–1875) , man of science and inventor, son of W. Wheatstone, a music-seller of Gloucester, was born at Gloucester in February 1802, and educated in a private school there. At the age of twenty-one he commenced business in London as a musical instrument maker. A few months after he contributed a paper to Thomson's ‘Annals of Philosophy’ on his early experiments on sound. Other papers followed, and among them was a description of his ‘kaleidophone.’ This consisted of steel wire of rectangular cross-section fixed to a heavy base and carrying a silver bead at the top. ”
