Technical illustrations of a variety of items of 19th century electric telegraph equipment. Illustrations include posts, wires and insulators, submari

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Technical illustrations of a variety of items of 19th century electric telegraph equipment. Illustrations include posts, wires and insulators, submarine cables; various telegraph machines and a Morse Sounder.

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Size: 3307px × 5328px
Photo credit: © SHEILA TERRY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1800, 1807, alkaline, alkalis, barium, batteries, calcium, chemistry, compound, current, davy, earths, electrical, electrolysis, humphry, institution, magnesium, potash, potassium, royal, sodium, strontium, substances, voltaic