Template:Selected anniversaries/April 5: Difference between revisions

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File:Blaise_de_Vigenère.png|link=Blaise de Vigenère (nonfiction)|1523: Cryptographer and diplomat [[Blaise de Vigenère (nonfiction)]] born. The Vigenère cipher will be misattributed to him;  Vigenère himself will devise a different, stronger cipher.  
File:Blaise_de_Vigenère.png|link=Blaise de Vigenère (nonfiction)|1523: Cryptographer and diplomat [[Blaise de Vigenère (nonfiction)]] born. The Vigenère cipher will be misattributed to him;  Vigenère himself will devise a different, stronger cipher.  
||1588: Thomas Hobbes born ... philosopher, considered to be one of the founders of modern political philosophy. Hobbes is best known for his 1651 book ''Leviathan'', which expounded an influential formulation of social contract theory. In addition to political philosophy, Hobbes also contributed to a diverse array of other fields, including history, jurisprudence, geometry, the physics of gases, theology, ethics, and general philosophy. Pic.
||1610: Writing to Galileo, Kepler was impressed by the observation that stars seen through the telescope still sparkled, in contrast to the circular appearance of planets. He asked:
"What other conclusion shall we draw from this difference, Galileo, than that the fixed stars generate their light from within, whereas the planets, being opaque, are illuminated from without; that is, to use Bruno’s terms, the former are suns, the latter, moons, or earths?" *Steven Soter, Ciclops.org https://pballew.blogspot.com/2019/04/on-this-day-in-math-april-5.html


File:Vincenzo Viviani.jpg|link=Vincenzo Viviani (nonfiction)|1622: Mathematician and scientist [[Vincenzo Viviani (nonfiction)|Vincenzo Viviani]] born. In 1660, Viviani and Giovanni Alfonso Borelli will conduct an experiment to determine the speed of sound. Timing the difference between the seeing the flash and hearing the sound of a cannon shot at a distance, they will calculate a value of 350 meters per second (m/s), considerably better than the previous value of 478 m/s obtained by Pierre Gassendi.
File:Vincenzo Viviani.jpg|link=Vincenzo Viviani (nonfiction)|1622: Mathematician and scientist [[Vincenzo Viviani (nonfiction)|Vincenzo Viviani]] born. In 1660, Viviani and Giovanni Alfonso Borelli will conduct an experiment to determine the speed of sound. Timing the difference between the seeing the flash and hearing the sound of a cannon shot at a distance, they will calculate a value of 350 meters per second (m/s), considerably better than the previous value of 478 m/s obtained by Pierre Gassendi.
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||1722: The Dutch explorer Jacob Roggeveen discovers Easter Island. Pic search yes: https://www.google.com/search?q=jacob+roggeveen
||1722: The Dutch explorer Jacob Roggeveen discovers Easter Island. Pic search yes: https://www.google.com/search?q=jacob+roggeveen
||1800: 1800 A UFO sighting near Baton Rouge, Louisiana will be reported to the American Philosophical Society by Thomas Jefferson, President of the society, and (at that time) Vice-President of the United States. The report of a UFO by a Vice-President is still the highest government official to report a UFO. The report itself was written by the naturalist William Dunbar: "A phenomenon was seen to pass Baton Rouge on the night of the 5th April 1800, of which the following is the best description I have been able to obtain. It was first seen in the South West, and moved so rapidly, passing over the heads of the spectators, as to disappear in the North East in about a quarter of a minute. It appeared to be of the size of a large house, 70 or 80 feet long" https://pballew.blogspot.com/2019/04/on-this-day-in-math-april-5.html  Pic.


File:Joseph Lister 1902.jpg|link=Joseph Lister (nonfiction)|1827: Surgeon and scientist [[Joseph Lister (nonfiction)|Joseph Lister]] born. He will pioneer antiseptic surgery, performing the first antiseptic surgery in 1865.
File:Joseph Lister 1902.jpg|link=Joseph Lister (nonfiction)|1827: Surgeon and scientist [[Joseph Lister (nonfiction)|Joseph Lister]] born. He will pioneer antiseptic surgery, performing the first antiseptic surgery in 1865.
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File:Wallace War-Heels.jpg|link=Wallace War-Heels|1870: Adventurer [[Wallace War-Heels]] publishes autobiography.
File:Wallace War-Heels.jpg|link=Wallace War-Heels|1870: Adventurer [[Wallace War-Heels]] publishes autobiography.
||1881: Hermann von Helmholtz presented The Faraday Lecture before the Fellows of the Chemical Society in London. His topic was The Modern Development of Faraday's Conception of Electricity. Helmholtz recognized Michael Faraday as being the person who most advanced the general scientific method, saying “His principal aim was to express in his new conceptions only facts, with the least possible use of hypothetical substances and forces.” *TIS  https://pballew.blogspot.com/2019/04/on-this-day-in-math-april-5.html


File:Joseph Bertrand.jpg|link=Joseph Bertrand (nonfiction)|1900: Mathematician, economist, and academic [[Joseph Bertrand (nonfiction)|Joseph Louis François Bertrand]] dies. He worked in the fields of number theory, differential geometry, probability theory, economics and thermodynamics.
File:Joseph Bertrand.jpg|link=Joseph Bertrand (nonfiction)|1900: Mathematician, economist, and academic [[Joseph Bertrand (nonfiction)|Joseph Louis François Bertrand]] dies. He worked in the fields of number theory, differential geometry, probability theory, economics and thermodynamics.
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||1951: Cold War: Ethel and Julius Rosenberg are sentenced to death for spying for the Soviet Union.
||1951: Cold War: Ethel and Julius Rosenberg are sentenced to death for spying for the Soviet Union.
||1955: 1955 On the 5th of April, 1955, Nobel laureate Bertrand Russell sent a following letter to Albert Einstein along with a rough draft of what would soon be known as the Russell-Einstein Manifesto - a written warning to the world's population on the dangers of nuclear weapons, and a plea for all leaders to avoid war when faced with conflict - and asked him to be both a signatory and supporter.  https://pballew.blogspot.com/2019/04/on-this-day-in-math-april-5.html


||1958: Ripple Rock, an underwater threat to navigation in the Seymour Narrows in Canada is destroyed in one of the largest non-nuclear controlled explosions of the time.
||1958: Ripple Rock, an underwater threat to navigation in the Seymour Narrows in Canada is destroyed in one of the largest non-nuclear controlled explosions of the time.

Revision as of 09:09, 5 April 2019

  • 1523: Cryptographer and diplomat Blaise de Vigenère (nonfiction) born. The Vigenère cipher will be misattributed to him; Vigenère himself will devise a different, stronger cipher.

    1523: Cryptographer and diplomat Blaise de Vigenère (nonfiction) born. The Vigenère cipher will be misattributed to him; Vigenère himself will devise a different, stronger cipher.

  • 1622: Mathematician and scientist Vincenzo Viviani born. In 1660, Viviani and Giovanni Alfonso Borelli will conduct an experiment to determine the speed of sound. Timing the difference between the seeing the flash and hearing the sound of a cannon shot at a distance, they will calculate a value of 350 meters per second (m/s), considerably better than the previous value of 478 m/s obtained by Pierre Gassendi.

    1622: Mathematician and scientist Vincenzo Viviani born. In 1660, Viviani and Giovanni Alfonso Borelli will conduct an experiment to determine the speed of sound. Timing the difference between the seeing the flash and hearing the sound of a cannon shot at a distance, they will calculate a value of 350 meters per second (m/s), considerably better than the previous value of 478 m/s obtained by Pierre Gassendi.

  • 1827: Surgeon and scientist Joseph Lister born. He will pioneer antiseptic surgery, performing the first antiseptic surgery in 1865.

    1827: Surgeon and scientist Joseph Lister born. He will pioneer antiseptic surgery, performing the first antiseptic surgery in 1865.

  • 1869: Physicist, mathematician, and engineer Sergey Chaplygin born. He will be known for mathematical formulas such as Chaplygin's equation, and for a hypothetical substance in cosmology called Chaplygin gas, named after him.

    1869: Physicist, mathematician, and engineer Sergey Chaplygin born. He will be known for mathematical formulas such as Chaplygin's equation, and for a hypothetical substance in cosmology called Chaplygin gas, named after him.

  • 1870: Adventurer Wallace War-Heels publishes autobiography.

    1870: Adventurer Wallace War-Heels publishes autobiography.

  • 1900: Mathematician, economist, and academic Joseph Louis François Bertrand dies. He worked in the fields of number theory, differential geometry, probability theory, economics and thermodynamics.

    1900: Mathematician, economist, and academic Joseph Louis François Bertrand dies. He worked in the fields of number theory, differential geometry, probability theory, economics and thermodynamics.

  • 1910: Havelock and Nikola Tesla share Nobel Prize in Physics for research into electrical field modulation and data transmission.

    1910: Havelock and Nikola Tesla share Nobel Prize in Physics for research into electrical field modulation and data transmission.

  • 1976: Businessman, investor, aviator, film director, and philanthropist Howard Hughes dies. He was known during his lifetime as one of the most financially successful individuals in the world.

    1976: Businessman, investor, aviator, film director, and philanthropist Howard Hughes dies. He was known during his lifetime as one of the most financially successful individuals in the world.

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