Chemist Leonard Gale andmechanic Alfred Vail joined this man in his most famous effort, which improved on an inventionby Cooke and Wheatstone that used a cumbersome set of six coiled wires

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1. Chemist Leonard Gale andmechanic Alfred Vail joined this man in his most famous effort, which improved on an inventionby Cooke and Wheatstone that used a cumbersome set of six coiled wires