births
February 6, 1802
Charles Wheatstone, English-French physicist and cryptographer (died 1875)
Charles Wheatstone
Sir Charles Wheatstone was an English physicist and inventor best known for his contributions to the development of the Wheatstone bridge, originally invented by Samuel Hunter Christie, which is used to measure an unknown electrical resistance, and as a major figure in the development of telegraphy. His other contributions include the English concertina, the stereoscope and the Playfair cipher.