Public domain
Two Samples of Telegraph Cable for Mines
From the collection of Rijksmuseum, Amsterdam. Free to download, adapt and use — no permission needed.
About this work
Two samples with a core of seven copper wires in a thick insulating layer of black plastic and paper.
Rijksmuseum, Amsterdam’s own descriptionSubjects
Credit lineTwo Samples of Telegraph Cable for Mines. 1865 - 1875. anonymous. Rijksmuseum, Amsterdam. Public domain.