TY - CHAP DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: Public Domain Mark 1.0 TI - Passage of current between London and York T2 - Wonders of electricity and the elements, being a popular account of modern electrical and magnetic discoveries, magnetism and electric machines, the electric telegraph and the electric light, and the metal bases, salt, and acids ID - jl7rf1w AU - Ward, Lock CY - London, England DA - 1870/// YR - 1870 UR - https://digital.sciencehistory.org/works/jl7rf1w AB - Diagram depicting the passage of current between the cities of London and York in a needle telegraph system. One of the two main types of electromagnetic telegraphs, needle telegraphs use indicating needles moved electromagnetically as a means of displaying messages. KW - Electricity KW - Magnetism KW - Electric machines KW - Telegraph KW - Scientific illustration KW - Communication and technology KW - Telecommunication LA - English ER -