Submarine cable. Nine samples of submarine cables - five short lengths and four cross sections in a wooden box. The lengths are bound at each end by metal bands. The glass for the lid is missing.
A) Core of seven copper conductors surrounded by layers of gutta percha and tarred hemp. The outer sheathing consists of ten galvanised wires and a further layer of gutta percha and hemp.
B)Core of seven copper wires, ten galvanised iron wires. The cross section is missing.
C) Cores of seven wires, nine iron wires each surrounded by a layer of gutta percha.
B1) Core of seven wires and twelve iron wires.
E) Core of seven wires and ten iron wires.