The Playfair cipher was invented in 1854 by an English scientist and inventor of many scientific breakthroughs of what era?
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Playfair cipher The Playfair cipher or Playfair square or Wheatstone-Playfair cipher or Wheatstone cipher is a manual symmetric encryption technique and was the first literal digram substitution cipher. The scheme was invented in 1854 by Charles Wheatstone, but bears the name of Lord Playfair who promoted the use of the cipher.
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Charles Wheatstone Sir Charles Wheatstone FRS (6 February 1802 – 19 October 1875), was an English scientist and inventor of many scientific breakthroughs of the Victorian era, including the English concertina, the stereoscope (a device for displaying three-dimensional images), and the Playfair cipher (an encryption technique). However, Wheatstone is best known for his contributions in the development of the Wheatstone bridge, originally invented by Samuel Hunter Christie, which is used to measure an unknown electrical resistance, and as a major figure in the development of telegraphy.
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John Wallis John Wallis ( ; 3 December 1616 – 8 November 1703) was an English mathematician who is given partial credit for the development of infinitesimal calculus. Between 1643 and 1689 he served as chief cryptographer for Parliament and, later, the royal court. He is credited with introducing the symbol ∞ for infinity. He similarly used 1/∞ for an infinitesimal.
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Carl Friedrich Gauss Johann Carl Friedrich Gauss ( ; German: "Gauß" , ] ; Latin: "Carolus Fridericus Gauss" ) (30 April 177723 February 1855) was a German mathematician who contributed significantly to many fields, including number theory, algebra, statistics, analysis, differential geometry, geodesy, geophysics, mechanics, electrostatics, magnetic fields, astronomy, matrix theory, and optics.
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John Edensor Littlewood John Edensor Littlewood FRS LLD (9 June 1885 – 6 September 1977) was an English mathematician, best known for his achievements in analysis, number theory,
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Flinders Petrie Sir William Matthew Flinders Petrie, FRS, FBA (3 June 1853 – 28 July 1942), commonly known as Flinders Petrie, was an English Egyptologist and a pioneer of systematic methodology in archaeology and preservation of artifacts. He held the first chair of Egyptology in the United Kingdom, and excavated many of the most important archaeological sites in Egypt in conjunction with his wife, Hilda Petrie. Some consider his most famous discovery to be that of the Merneptah Stele, an opinion with which Petrie himself concurred. Petrie developed the system of dating layers based on pottery and ceramic findings.
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H. J. R. Murray Harold James Ruthven Murray (24 June 1868 – 16 May 1955) was an English educationalist, inspector of schools, and prominent chess historian. He was the first to publish the theory that chess originated in India.
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John Lennard-Jones Sir John Edward Lennard-Jones KBE, FRS (27 October 1894 – 1 November 1954) was a British mathematician who was a professor of theoretical physics at University of Bristol, and then of theoretical science at the University of Cambridge. He may be regarded as the initiator of modern computational chemistry.
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Charles Macintosh Charles Macintosh FRS (29 December 1766 – 25 July 1843) was a Scottish chemist and the inventor of waterproof fabric. The Mackintosh raincoat (the variant spelling is now standard) is named after him.
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Manfred Clynes Manfred Clynes (born August 14, 1925) is a scientist, inventor, and musician. He is best known for his innovations and discoveries in the interpretation of music, and for his contributions to the study of biological systems and neurophysiology.
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Alice Leigh-Smith Alice Leigh-Smith (née Prebil) was an English nuclear physicist. She married Philip Leigh-Smith, the son of the Arctic explorer Benjamin Leigh-Smith, in 1933. She was a student of Marie Curie and was the first British woman to receive a PhD in nuclear physics. She, together with Walter Minder, announced the discovery of element 85 (now called astatine) in 1942. They proposed the name anglohelvetium for the new element. Later it was proven that in fact Walter Minder had not discovered element 85. Leigh-Smith was also involved in the use of radioactive substances as a treatment for cancer.
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Frederick Beaumont Frederick Edward Blackett Beaumont (22 October 1833 – 20 August 1899) was an English-born British officer of the Royal Engineers who produced several inventions, including a tunneling machine which bore his name, and the Beaumont–Adams revolver.
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Ernest Walton Ernest Thomas Sinton Walton (6 October 1903 – 25 June 1995) was an Irish physicist and Nobel laureate for his work with John Cockcroft with "atom-smashing" experiments done at Cambridge University in the early 1930s, and so became the first person in history to artificially split the atom.
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James Chadwick Sir James Chadwick, {'1': ", '2': ", '3': ", '4': "} (20 October 1891 – 24 July 1974) was an English physicist who was awarded the 1935 Nobel Prize in Physics for his discovery of the neutron in 1932. In 1941, he wrote the final draft of the MAUD Report, which inspired the U.S. government to begin serious atomic bomb research efforts. He was the head of the British team that worked on the Manhattan Project during the Second World War. He was knighted in England in 1945 for his achievements in physics.
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Science in the Age of Enlightenment The history of science during the Age of Enlightenment traces developments in science and technology during the Age of Reason, when Enlightenment ideas and ideals were being disseminated across Europe and North America. Generally, the period spans from the final days of the 16th and 17th-century Scientific revolution until roughly the 19th century, after the French Revolution (1789) and the Napoleonic era (1799–1815). The scientific revolution saw the creation of the first scientific societies, the rise of Copernicanism, and the displacement of Aristotelian natural philosophy and Galen’s ancient medical doctrine. By the 18th century, scientific authority began to displace religious authority, and the disciplines of alchemy and astrology lost scientific credibility.
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George Atwood George Atwood (October 1745, London – 11 July 1807, London) was an English mathematician who invented a machine for illustrating the effects of Newton's first law of motion. He was also a renowned chess player whose skill for recording many games of his own and of other players, including François-André Danican Philidor, the leading master of his time, left a valuable historical record for future generations.
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Oliver Lodge Sir Oliver Joseph Lodge, {'1': ", '2': ", '3': ", '4': "} (12 June 1851 – 22 August 1940) was a British physicist and writer involved in the development of, and holder of key patents for, radio. He identified electromagnetic radiation independent of Hertz' proof and at his 1894 Royal Institution lectures (""The Work of Hertz and Some of His Successors""), Lodge demonstrated an early radio wave detector he named the "coherer". In 1898 he was awarded the "syntonic" (or tuning) patent by the United States Patent Office. Lodge was Principal of the University of Birmingham from 1900 to 1920.
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John Harrison John Harrison (3 April [O.S. 24 March] 1693 – 24 March 1776) was a self-educated English carpenter and clockmaker who invented a marine chronometer, a long-sought-after device for solving the problem of calculating longitude while at sea. His solution revolutionized navigation and greatly increased the safety of long-distance sea travel. The problem he solved was considered so important following the Scilly naval disaster of 1707 that the British Parliament offered financial rewards of up to £20,000 (equivalent to £ today) under the 1714 Longitude Act. Harrison came 39th in the BBC's 2002 public poll of the 100 Greatest Britons.
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Michael Faraday Michael Faraday FRS ( ; 22 September 1791 – 25 August 1867) was an English scientist who contributed to the study of electromagnetism and electrochemistry. His main discoveries include the principles underlying electromagnetic induction, diamagnetism and electrolysis.
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Charles Darwin Charles Robert Darwin, {'1': ", '2': ", '3': ", '4': "} ( ; 12 February 1809 – 19 April 1882) was an English naturalist, geologist and biologist, best known for his contributions to the science of evolution. He established that all species of life have descended over time from common ancestors and, in a joint publication with Alfred Russel Wallace, introduced his scientific theory that this branching pattern of evolution resulted from a process that he called natural selection, in which the struggle for existence has a similar effect to the artificial selection involved in selective breeding.
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Cavendish Professor of Physics The Cavendish Professorship is one of the senior faculty positions in physics at the University of Cambridge. It was founded on 9 February 1871 alongside the famous Cavendish Laboratory, which was completed three years later. William Cavendish, 7th Duke of Devonshire endowed both the professorship and laboratory in honor of his relative, chemist and physicist Henry Cavendish.
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Thomas Mudge (horologist) Thomas Mudge (1715 – 14 November 1794 London) was an English horologist who invented the lever escapement, the greatest single improvement ever applied to pocket watches.