Sample of Telegraph Cable, Sample of telegraph cable, presumably for sea mines. It is a short piece of wire rope of ten wires, around a copper wire in a thick insulating layer consisting of an unknown plastic (presumably gutta percha) and paper., anonymous, unknown, 1865 - 1875, iron (metal), copper (metal), paper, l 18.8 cm × d 1.8 cm.
Sample of Telegraph Cable, Sample of telegraph cable, presumably for sea mines. It is a short piece of wire rope of ten wires, around a copper wire in a thick insulating layer consisting of an unknown plastic (presumably gutta percha) and paper., anonymous, unknown, 1865 - 1875, iron (metal), copper (metal), paper, l 18.8 cm × d 1.8 cm