Five specimens showing the construction of the Atlantic Telegraph Cable, 1857

Piece of the Persian Gulf telegraph cable after 16 years submersion, 1850 - 1880

Specimen of telegraph cable, unidentified

One of a group of eleven specimens illustrating the method of jointing the core of the Atlantic cable laid in 1866 - the end of a cable conductor scarfed and tinned ready for soldering

One of a group of eleven specimens illustrating the method of jointing the core of the Atlantic cable laid in 1866 - the end of a cable conductor scarfed and tinned ready for soldering

One of a group of eleven specimens illustrating the method of jointing the core of the Atlantic cable laid in 1866 - a joined conductor

One of a group of eleven specimens illustrating the method of jointing the core of the Atlantic cable laid in 1866 - a joint wrapped with fine copper wire

One of a group of eleven specimens illustrating the method of jointing the core of the Atlantic cable laid in 1866 - a joint tested to destruction

One of a group of eleven specimens illustrating the method of jointing the core of the Atlantic cable laid in 1866 - tinned binding wire

One of a group of eleven specimens illustrating the method of jointing the core of the Atlantic cable laid in 1866 - the first layer of gutta-percha insulation applied

One of a group of eleven specimens illustrating the method of jointing the core of the Atlantic cable laid in 1866 - the second layer of gutta-percha insulation applied

One of a group of eleven specimens illustrating the method of jointing the core of the Atlantic cable laid in 1866 - the third layer of gutta-percha insulation applied

One of a group of eleven specimens illustrating the method of jointing the core of the Atlantic cable laid in 1866 - the fourth layer of gutta-percha insulation applied

One of a group of eleven specimens illustrating the method of jointing the core of the Atlantic cable laid in 1866 - the cable opened to show layers of insulation and core