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