Underground oil-filled telegraph cable system, 1880.

UNITED KINGDOM - DECEMBER 13: In the 1870s an American, David Brooks, developed a method of insulating copper telegraph wires with manilla hemp strands, laid underground in a pipe filled with mineral oil. An experimental cable of 30 wires in a wrought iron pipe was installed in London between Westminster Bridge Road and Clapham Junction in 1880 and lasted in service until 1889. This cable specimen on its display board is likely to have been made up at the time to publicise the system. The text is an extract from a technical description of the cable system published in the Journal of the Society of Telegraph Engineers. (Photo by SSPL/Getty Images)
UNITED KINGDOM - DECEMBER 13: In the 1870s an American, David Brooks, developed a method of insulating copper telegraph wires with manilla hemp strands, laid underground in a pipe filled with mineral oil. An experimental cable of 30 wires in a wrought iron pipe was installed in London between Westminster Bridge Road and Clapham Junction in 1880 and lasted in service until 1889. This cable specimen on its display board is likely to have been made up at the time to publicise the system. The text is an extract from a technical description of the cable system published in the Journal of the Society of Telegraph Engineers. (Photo by SSPL/Getty Images)
Underground oil-filled telegraph cable system, 1880.
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Crédito:
Science & Society Picture Library / Colaborador
Editorial n.º:
90758679
Colección:
SSPL
Fecha de creación:
13 de diciembre de 2005
Fecha de subida:
Tipo de licencia:
Con derechos gestionados
Inf. de autorización:
No se cuenta con autorizaciones. Más información
Fuente:
SSPL
Nombre del objeto:
10459334
Tamaño máx. archivo:
4102 x 3006 px (34,73 x 25,45 cm) - 300 dpi - 5 MB