| 31. | Conversely, the engineer Oliver Heaviside produced major work on the mathematics of transmission on telegraph cables.
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| 32. | The telegraph cable operated from 1901 to 1959.
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| 33. | On 29 April the American protected cruiser tried to cut telegraph cables linking Cienfuegos with Madrid.
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| 34. | The study of underwater telegraph cables accelerated interest in mathematical analysis of very long transmission lines.
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| 35. | In 1866 the Great Eastern laid the first successful transatlantic telegraph cable and Thomson was knighted.
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| 36. | Undersea telegraph cables were usually a single conductor protected by steel-wire armour, effectively a coaxial cable.
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| 37. | Twelve trans-Atlantic telegraph cables snapped in multiple places.
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| 38. | Telegraph cables under the ocean were damaged, cutting off the island from outside communication for a time.
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| 39. | Underground telegraph cables into large buildings or between stations often needed to carry multiple independent telegraph lines.
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| 40. | Underwater telegraph cables were installed in 1921.
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