The nineteenth century was a very prolific era of discoveries in electrical knowledge and technologies that laid the foundation for modern electrical communication. During this period, the foundations of modern electricity-based technologies were discovered. The nineteenth century began with a debate between Luigi Galvani and Alessandro Volta regarding the source of electricity in Galvani's famous frog experiment. These debates lead to Volta's invention of the battery and Volta's invention of the battery. Volta's discoveries would pave the way for Ohm's law several years later. However, before that discovery occurred, Hans Christian Ørstead discovered electromagnetism, which was later used by André Marie Amperè to prove that magnetism is electricity. After the publication of Ohm's law, Faraday published his findings on induction in the 1830s. In the same decade, the DC generator and transformer were invented, followed in 1840 by the invention of the AC generator. Communications technologies advanced at an incredible pace. Sömmering would design the first multi-line telegraph and Morse would refine it into a practical single-wire design. The work of Charles Wheatstone in telegraphy and Heinrich Hertz in wave theory paved the way for modern communications. Alexander Graham Bell invented the telephone in 1876. Èdouard Branly would contribute a detector that allowed the invention of the radio. Guglielmo Marconi and Alexander Stepanovich Popov will develop the first radios. From the invention of the battery to the first transmission of intercontinental telegrams, advances in electrical technologies in the 19th century made possible the 20th- and 21st-century technological boom in communications...... middle of paper...... ambridge University Press on behalf of the British Society for the History of Science, The British Journal for the History of Science, vol. 1, No. 1 (June 1962), pp. 31-48, [Online] Available: http://www.jstor.org/stable/4025073[9] Joost Mertens, Shocks and Sparks: The Voltaic Pile as a Demonstration Device, The University of Chicago Press on behalf of The History of Science Society, Isis Vol. 89, No. 2 (June 1998), pp. 304 [Online] Available: http://www.jstor.org/stable/237757.[10] Herbert W. Meyer, A History of Electricity and Magnetism, Massachusetts Institute of Technology, 1971, pp. 39, 73, 100, 201.[11] Richard Wolfson, University Physics Second Edition, Pearson, 2012, pp. 453, 454.[12] Dan M. Worrall, David Edward Hughes: Concertina Player and Inventor, Papers of the International Concertina Association, Allan Atlas, ed., vol. 4.2007, pp. 4.