THE EVOLUTION OF THE SUBMARINE TELEGRAPH.

Keywords: EVOLUTION, SUBMARINE, TELEGRAPHS, UNDERWATER, CONDUCTORS, CONDUCTIVITY, CABLES, COPPER, ELECTRICAL, ELECTRICITY, PURITY, SINGLE, WIRE, GAUGES, WEIGHT, MACHINES, LAY, LENGTH, INSULATION, SUBAQUEOUS, UNDERGROUND, FAILURES, RESINS, CORES, RESISTANCE, STATIC, PRESSURE, TESTS, RUBBER, METALS, MARINE, BORERS, TEREDO, TEREDO NAVALIS, CORROSION, BEDDING, HEMP, JUTE, ARMOURING, IRON, OXIDATION, PRESERVATION, GALVANISING, BINDING, JOINTS, FORMULAE, COVERED, SHAFTS, POWER, OUTPUT