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Who said: “Genius is two percent inspiration, ninety-eight percent perspiration.”
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< 16 Apr | 18 Apr >
APRIL 17 – BIRTHS – Scientists born on April 17th
  Georges J.F. Kφhler
baby icon  Born 17 Apr 1946; died 1 Mar 1995 at age 48.
Georges Jean Franz Kφhler was a German immunologist who shared (with César Milstein and Niels K. Jerne) the 1984 Nobel Prize for Physiology or Medicine for his work in developing the technique for producing monoclonal antibodies - pure, uniform, and highly sensitive protein molecules used in diagnosing and combating a number of diseases. These antibodies, and the subsequent developments based their work, revolutionized the diagnosis and treatment of many immunologic diseases, including some forms of cancer and AIDS. In 1975, he and Milstein published in Nature the results of their work leading to the production of monoclonal antibodies “Continuous cultures of fused cells secreting antibody of predefined specificity.” Milstein's and Koehler's method of producing monoclonal antibodies involves fusing an antibody-producing cell - which can recognize an invading organism - with a tumor cell, which lives and reproduces indefinitely. Their discoveries are being used in research on mild illnesses and diseases such as cancer and AIDS.
  Charles Yanofsky
baby icon  Born 17 Apr 1925.
American geneticist who demonstrated the colinearity of gene and protein structures. In the 1960s, Yanofsky began work on the structure of proteins and genes responsible for tryptophan biosynthesis. He used the expression and regulation of these proteins as tools to dissect the inner workings of the cell's genetic apparatus. This work on the nature of mutations that prevent tryptophan biosynthesis produced some of his most significant discoveries. His remarkable exploitation of the E. coli tryptophan operon to work out the biochemical pathway of the synthesis of an amino acid and to elucidate fundamental aspects of transcription and translation, such as missense suppression and polarity, are historic achievements.
book icon Microbiology: A Centenary Perspective, by Charles Yanofsky, co-author. - book suggestion.
  Sir Vincent (Brian) Wigglesworth
Thumbnail - Sir Vincent (Brian) Wigglesworth
c.1980s
(source)
baby icon  Born 17 Apr 1899; died 11 Feb 1994 at age 94.
English entomologist who pioneered in the study of insect physiology; he was particularly respected for his research into the role of hormones in insect growth, metamorphosis, and reproduction and for his insights into simple mechanisms, such as how insects walk upside down. His investigations of the living insect body and its tissues and organs revealed much about the dynamic complexity of individual insects and their interactions with the environment. An important contribution was his recognition that insects could be used - instead of mice or other laboratory animals - for the fundamental investigation of animal physiology and function. His Insect Physiology (1934) is often considered the foundation for this branch of entomology.
book icon Insect Physiology, by Vincent B. Wigglesworth. - book suggestion.
  Sir Leonard Woolley
baby icon  Born 17 Apr 1880; died 20 Feb 1960 at age 79.
Charles Leonard Woolley was an English archaeologist whose excavation (1922-34) of the ancient Sumerian city of Ur (in modern Iraq), the royal burial site of many Mesopotamian royalties, greatly advanced knowledge of ancient Mesopotamian civilization, enabling scholars to trace the history of the city from its final days during the 4th century BC back to its prehistoric beginnings (c. 4000 BC). His finds revealed much about everyday life, art, architecture, literature, government, and religion in this "cradle of civilization. " In royal tombs dating from about 2700 BC, he uncovered the practice of the sacrificial burial of a deceased king's personal retinue. He discovered tombs of great material wealth, gold and silver jewelry, large paintings of ancient Mesopotamian culture at its zenith, and other furnishings. The most extravagant tomb of Queen Pu-Abi was untouched by the hands of looters through the millennia, with many well-preserved items, including a cylindrical seal bearing her name in Sumerian. His widely read Ur of the Chaldees: A record of seven years of excavation (1929), described his findings in a manner both informative to specialists and accessible by lay-persons.
book icon Woolley of Ur: The Life of Sir Leonard Woolley, by H. V. F. Winstone. - book suggestion.
  Clarence Hungerford Mackay
baby icon  Born 17 Apr 1874; died 12 Nov 1938 at age 64.
American communications executive and philanthropist who supervised the completion of the first transpacific cable between the United States and the Far East in 1904. He laid a cable between New York and Cuba in 1907 and later established cable communication with southern Europe via the Azores and with northern Europe via Ireland. In 1928, he became the first to combine radio, cables, and telegraphs under one management. Unfortunately the Postal Telegraph-Commercial Cable empire he had inherited from his father was shattered in the depression of 1929, going into receivership in 1935. In 1943 the Mackay land lines merged with Western Union. He founded the multinational company International Telephone and Telegraph.
  Ernest Henry Starling
baby icon  Born 17 Apr 1866; died 2 May 1927 at age 61.  quotes button quotes
English physiologist whose prolific contributions to a modern understanding of body functions include Starling's hypothesis (in which he described the forces that propel fluids through blood vessels) and his discovery of how hormones and nerves control digestion. He coined the term "hormone" for the body's chemical messengers from the endocrine glands (1905). His "law of the heart" stated the strength of the heart contraction is proportional to the stretching of the heart muscle. He discovered the functional significance of serum proteins. In 1902 along with William Bayliss he demonstrated that secretin stimulates pancreatic secretion. In 1924 along with E. B. Vernay he demonstrated the reabsorption of water by the tubules of the kidney.
book icon Principles of Human Physiology, by Ernest Henry Starling. - book suggestion.
  Augustus Edward Hough Love
baby icon  Born 17 Apr 1863; died 5 Jun 1940 at age 77.
British geophysicist and mathematician who discovered a major type of earthquake wave that was subsequently named for him. Love assumed that the Earth consists of concentric layers that differ in density and postulated the occurrence of a seismic wave confined to the surface layer (crust) of the Earth which propagated between the crust and underlying mantle. His prediction was confirmed by recordings of the behaviour of waves in the surface layer of the Earth. He proposed a method, based on measurements of Love waves, to measure the thickness of the Earth's crust. In addition to his work on geophysical theory, Love studied elasticity and wrote A Treatise on the Mathematical Theory of Elasticity, 2 vol. (1892-93).
book icon Treatise on the Mathematical Theory of Elasticity, by Augustus E. Love. - book suggestion.
  William John McGee
baby icon  Born 17 Apr 1853; died 4 Sep 1912 at age 59.
American geologist, hydrologist, archaeologist who was noted for his pioneer studies documenting the occurrence of waves of invasions and recessions of ice sheets in North America, thus establishing the complexity of the Great Ice Age. He worked in a number of governmental capacities, including as a director in the U.S. Geological Survey, and was a founder and president of the National Geographic Society. While on the staff of the Bureau of Soils, he organized the landmarkConference of Governors on Conservation of Natural Resources (13-15 May 1908) and has been called the "chief theorist of the conservation movement." As an anthropologist he studied the American Indians and wrote The Seri Indians (1898). [Image: Seri Indians]
book icon Trails to Tiburσn: The 1894 and 1895 Field Diaries of W J McGee, by Hazel McFeely Fontana. - book suggestion.
  Karl Friedrich Philipp von Martius
baby icon  Born 17 Apr 1794; died 13 Dec 1868 at age 74.
German botanist best known for his work on Brazilian flora. He spent three years on expedition with zoologist Johann Baptist von Spix to study the botany, zoology, mineralogy, and ethnology of Brazil, covering 6,500 km of Brazilian territory. Upon returning to Munich, they carried with them numerous examples of mammals, birds, fish, insects and vegetation. They also had written descriptions and etchings of all they had observed. Martius dedicated his life to the study of the material collected during his expedition to Brazil. In this way, such works as Flora Brasiliensis, considered to be one of the most important works on a country's flora, took form. It took 66 years to complete and the collaboration of 57 botanists from various parts of the world.
  Giovanni Riccioli
baby icon  Born 17 Apr 1598; died 25 Jun 1671 at age 73.
Giovanni Battista Riccioli was an Italian astronomer who was the first to observe (1650) a double star (two stars so close together that they appear to be one) - Mizar in Ursa Major, the middle star in the handle of the Big Dipper. He also discovered satellite shadows on Jupiter. In 1651, he assigned the majority of the lunar feature names in current use. He named the more prominent features after famous astronomers, scientists and philosophers, while the large dark and smooth areas he called "seas" or "maria". The lunar seas were named after moods (Seas of Tranquillity, Serenity) or terrestrial phenomena (Sea of Rains, Ocean or Storms) His map was published in Almagestum Novum in1651. [Image: Frontispiece from Riccioli's Almagestum novum, 1651]  read more button more


Nature bears long with those who wrong her. She is patient under abuse. But when abuse has gone too far, when the time of reckoning finally comes, she is equally slow to be appeased and to turn away her wrath. (1882) -- Nathaniel Egleston, who was writing then about deforestation, but speaks equally well about the danger of climate change today.
Carl Sagan Thumbnail Carl Sagan: In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) ...(more by Sagan)

Albert Einstein: I used to wonder how it comes about that the electron is negative. Negative-positive—these are perfectly symmetric in physics. There is no reason whatever to prefer one to the other. Then why is the electron negative? I thought about this for a long time and at last all I could think was “It won the fight!” ...(more by Einstein)

Richard Feynman: It is the facts that matter, not the proofs. Physics can progress without the proofs, but we can't go on without the facts ... if the facts are right, then the proofs are a matter of playing around with the algebra correctly. ...(more by Feynman)
Quotations by: • Albert Einstein • Isaac Newton • Lord Kelvin • Charles Darwin • Srinivasa Ramanujan • Carl Sagan • Florence Nightingale • Thomas Edison • Aristotle • Marie Curie • Benjamin Franklin • Winston Churchill • Galileo Galilei • Sigmund Freud • Robert Bunsen • Louis Pasteur • Theodore Roosevelt • Abraham Lincoln • Ronald Reagan • Leonardo DaVinci • Michio Kaku • Karl Popper • Johann Goethe • Robert Oppenheimer • Charles Kettering  ... (more people)

Quotations about: • Atomic  Bomb • Biology • Chemistry • Deforestation • Engineering • Anatomy • Astronomy • Bacteria • Biochemistry • Botany • Conservation • Dinosaur • Environment • Fractal • Genetics • Geology • History of Science • Invention • Jupiter • Knowledge • Love • Mathematics • Measurement • Medicine • Natural Resource • Organic Chemistry • Physics • Physician • Quantum Theory • Research • Science and Art • Teacher • Technology • Universe • Volcano • Virus • Wind Power • Women Scientists • X-Rays • Youth • Zoology  ... (more topics)
< 16 Apr | 18 Apr >
APRIL 17 – DEATHS – Scientists died on April 17th
  Arnold Neustadter
Thumbnail - Arnold Neustadter
gravestone icon  Died 17 Apr 1996 at age 85 (born 25 Aug 1910).
American inventor of the Rolodex, an alphabetized rotating card file with a ball-bearing clutch. He invented the device in the 1940s with the help of an engineer who developed the cylindrical housing. Neustadter specialized in office technology, also inventing the Swivodex, spill-proof inkwell and the Clipodex, a knee-top dictation tool.
  Roger Wolcott Sperry
gravestone icon  Died 17 Apr 1994 at age 80 (born 20 Aug 1913).
American neurobiologist, corecipient with David Hunter Hubel and Torsten Nils Wiesel of the Nobel Prize for Physiology or Medicine in 1981 for their investigations of brain function, Sperry in particular for his study of functional specialization in the cerebral hemispheres. He was responsible for overturning the widespread belief that the left brain is dominant by showing that several cognitive abilities were localized in the right brain. He also provided experimental proof for the specificity of the reconnection of regenerating severed neurons in newts, which later led to new theories on how neurons grow. After 1965, his work turned more to psychology and philosophy.
  Richard Dagobert Brauer
gravestone icon  Died 17 Apr 1977 at age 76 (born 10 Feb 1901).
German-American mathematician and educator, a pioneer in the development of algebra theory. He worked with Weyl on several projects including a famous joint paper on spinors (published in 1935 in the American Journal of Mathematics). This work provided a background for Paul Dirac's theory of the spinning electron within the framework of quantum mechanics. With Nesbitt, Brauer introduced the theory of blocks (1937). Brauer used this to obtain results on finite groups, particularly finite simple groups, and the theory of blocks would play a big part in much of Brauer's later work. Starting with his group-theoretical characterisation of the simple groups (1951), he spent the rest of his life formulating a method to classify all finite simple groups.
book icon Richard Brauer Collected Papers, Vol. 1: Theory of Algebras, and Finite Groups, by Richard Brauer. - book suggestion.
booklist icon Booklist for Richard Brauer.
  Henrik Dam
gravestone icon  Died 17 Apr 1976 at age 81 (born 21 Feb 1895).
Carl Peter Henrik Dam was a Danish biochemist who shared (with Edward A. Doisy) the 1943 Nobel Prize in Physiology or Medicine for research into antihemorrhagic substances and the discovery of vitamin K (1939).
  Jean Perrin
gravestone icon  Died 17 Apr 1942 at age 71 (born 30 Sep 1870).  quotes button quotes
Jean-Baptiste Perrin was a French physicist who, in his studies of the Brownian motion of minute particles suspended in liquids, verified Albert Einstein's explanation of this phenomenon and thereby confirmed the atomic nature of matter. Using a gamboge emulsion, Perrin was able to determine by a new method, one of the most important physical constants, Avogadro's number (the number of molecules of a substance in so many grams as indicated by the molecular weight, for example, the number of molecules in two grams of hydrogen). The value obtained corresponded, within the limits of error, to that given by the kinetic theory of gases. For this achievement he was honoured with the Nobel Prize for Physics in 1926.
  Harriet Brooks
gravestone icon  Died 17 Apr 1933 at age 56 (born 2 Jul 1876).  quotes button quotes
Canadian nuclear physicist who was probably the first to observe the recoil of the atomic nucleus as nuclear particles were emitted during radioactive decay. During the years 1901-05, she contributed much to the new science of radioactivity. Working with Ernest Rutherford, she measured the rate at which radium released radon (and other gases) into the air. They demonstrated that the diffusion of the emanations of radium both behaved like a a gas, and that this gas had a high (over 100) molecular weight. Rutherford credited her work identifying the release of radon as crucial to developing his theory of the transmutation of one element into another. She died at the age of 56, from leukemia or a like disease related to radiation exposure.
book icon Harriet Brooks: Pioneer Nuclear Scientist, by M.F. & G.W. Rayner-Canham. - book suggestion.
  Sir Patrick Geddes
gravestone icon  Died 17 Apr 1932 at age 77 (born 2 Oct 1854).
Scottish biologist and sociologist who was one of the modern pioneers of the concept of town and regional planning. He studied under Darwin's champion, Thomas Henry Huxley. As a professor of botany, Geddes emphasized the development of sexual reproduction as a major step in organic evolution and, with the naturalist John Arthur Thomson, published The Evolution of Sex (1889). Geddes turned his attention to sociology after an attack of blindness in Mexico hampered his biological experimentation. His researches in India, Palestine, Mexico, and Scotland led to his conviction that the development of human communities was primarily biological in nature, consisting of interactions among people, their environment, and their activities.
  E. G. Squier
gravestone icon  Died 17 Apr 1888 at age 66 (born 17 Jun 1821).
Ephraim George Squier was an American newspaper editor, diplomat and archaeologist was a newspaper editor, diplomat, and archaeologist who, with the physician and archaeologist Edwin H. Davis, conducted the first major study of the remains of the pre-Columbian North American Mound Builders. Their book, Ancient Monuments (1848, more familiarly known as "Squire and Davis") was the undisputed primary reference source of their time on Indian mounds in the eastern US. It gave the grandest illustrations of what remained of the unbelievable civilizations that inhabited this continent. While hundreds of mounds have been plowed flat, theirs is a guide to what was lost. He also explored in Central America, Peru, and Bolivia in an effort to find the origins of the Mound Builder civilization.
book icon Ancient Monuments of the Mississippi Valley, by E. H. Davis, E. G. Squier, Charles Sullivan.(illustrator). - book suggestion.
  Samuel Morey
gravestone icon  Died 17 Apr 1843 at age 80 (born 23 Oct 1762).
American inventor that one author called “the Edison of his day.” His inventions include raising water by wind (patented 11 Apr 1796), a rotary steam engine (14 Jul 1815), a fuel-saving fireplace (18 Jan 1813), a tide and current water wheel (13 Mar 1817), and shooting by steam (19 Jan 1819). Morey's earliest patent (26 Jan 1793), one of the first (No. X51) to be issued in the U.S., was for a rotating, steam-powered cooking spit for roasting meat, and was signed by George Washington. His next patent (25 Mar 1795) was for a steam engine to power boats, years before Robert Fulton. He developed a method for production of water gas fuel (a mixture of carbon monoxide and hydrogen from steam passed over heated carbon substances), patented as his “American Water Burner” (11 Dec 1817). On 1 Apr 1826, he was issued the first U.S. patent for an internal-combustion engine titled “Gas or Vapour Engine.”« [Image, drawn for a magazine (1909) is likely (?) from the artist's imagination. Webmaster has not yet found any other likeness on which it could have been based.]  read more button more
  Benjamin Franklin
gravestone icon  Died 17 Apr 1790 at age 84 (born 17 Jan 1706).  quotes button quotes
American printer and publisher, author, inventor and scientist, and diplomat. He become widely known in European scientific circles for his reports of electrical experiments and theories. He invented a type of stove, still being manufactured, to give more warmth than open fireplaces and the lightning rod.. He used  bifocal eyeglasses also were his ideas. Grasping the fact that by united effort a community may have amenities which only the wealthy few can get for themselves, he helped establish institutions people now take for granted: a fire company (1736), a library (1731), an insurance company (1752), an academy (1751), and a hospital (1751). In some cases these foundations were the first of their kind in North America.
book icon Benjamin Franklin: An American Life, by Walter Isaacson. - book suggestion.
booklist icon Booklist for Benjamin Franklin.
  Thomas Bayes
gravestone icon  Died 17 Apr 1761 (born 1702).  quotes button quotes
English theologian and mathematician who was the first to use probability inductively and who established a mathematical basis for probability inference (a means of calculating, from the frequency with which an event has occurred in prior trials, the probability that it will occur in future trials). This became the basis of a statistical technique, now called Bayesian estimation, for calculating the probability of the validity of a proposition on the basis of a prior estimate of its probability and new relevant evidence. Later statisticians cite disadvantages of the method that include the different ways of assigning prior distributions of parameters and the possible sensitivity of conclusions to the choice of distributions.
   Proclus
gravestone icon  Died 17 Apr 485 (born 410).  quotes button quotes
Greek mathematician.

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< 16 Apr | 18 Apr >
APRIL 17 – EVENTS – Science events on April 17th
  Apollo 13 return
calendar icon   In 1970, The Apollo 13 mission ended safely with a splashdown in the Pacific Ocean, four days after the spacecraft aborted its mission while it was four-fifths of the way to the moon. It was crippled when a tank containing liquid oxygen burst. The astronauts made an extraordinary escape. Upon his return, astronaut A. J. Lovell, Jr. was the first American astronaut to travel over 700 hours in space.
  Surveyor 3
calendar icon   In 1967, the spacecraft Surveyor 3 was successfully launched from Cape Kennedy, Florida. It was the second US spacecraft to make a soft landing on the moon, where it studied the lunar surface and sent more than 6300 pictures back to Earth. A total of seven Surveyors were sent to the moon, which were to support the coming crewed Apollo landings by validating soft-landing technology and determining the lunar surface conditions. Surveyor 3 carried a survey television camera, soil mechanics experiments, and devices to measure temperature and radar reflectivity as on the earlier missions. Its mass was1026 kg at launch and 296 kg upon landing.«
  First woman pilot's solo global flight
calendar icon   In 1964, Geraldine (“Jerrie”) Mock landed in Columbus, Ohio, becoming the first woman to complete a solo airplane flight around the world. She was a Columbus housewife with less than 800 hours logged in 7-1/2 years of flying experience, and had received her instrument rating less than a month before taking off from Columbus, on 19 Mar 1964, in a single-engine Cessna Model 180 aircraft on her 23,206-mile solo air voyage. The trip lasted 29-1/2 days with 21 stopovers. The insignia on the aircraft was “Spirit of Columbus,” but it was nick-named “Three-Eight Charlie.” She was born in Newark, Ohio, and had studied Aeronautical Engineering at Ohio State University. Though not without some problems, the ultimate success of her solo flight also reflects the reliability of small aircraft of the era.«
  Synthetic rubber
calendar icon   In 1930, the discovery of a new rubber-like compound was recorded by Dr. Arnold M. Collins in his laboratory notebook. He had noticed that a mixture that had stood from some weeks before, had solidified “to white, somewhat rubber-like masses,” from polymerization of monovinylacetylene mixed with concentrated HCl. He theorized the new compound was 2-chloro-1,3-butadiene. His research group at the Du Pont Company, over the next several weeks, but only gradually, recognized its potential as the first synthetic rubber. Wallace Carothers named it chloroprene. It was announced as DuPrene on 2 Nov 1931. After more development, it was sold as a material useful for products impervious to oil, for electrical wire insulation and as a coating compound. From 1936, it is known as Neoprene
  San Francisco earthquake
calendar icon   In 1906, San Francisco was hit by a disastrous earthquake.
  Oil well fire
calendar icon   In 1861, the first oil well fire occurred at the Little and Merrick well at Oil Creek, near Rouseville, Pennsylvania. It ignited shortly after gushing, burned for three days, and resulted in 19 deaths.
  Combination printing press
calendar icon   In 1844, the first U.S. patent for a cylinder and flatbed combination printing press was issued to Robert Hoe.
  Pineapple cheese
calendar icon   In 1810, the first U.S. patent for pineapple cheese was issued to L.M. Norton of Troy, Pennsylvania.

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- 100 -
Sophie Germain
Gertrude Elion
Ernest Rutherford
James Chadwick
Marcel Proust
William Harvey
Johann Goethe
John Keynes
Carl Gauss
Paul Feyerabend
- 90 -
Antoine Lavoisier
Lise Meitner
Charles Babbage
Ibn Khaldun
Euclid
Ralph Emerson
Robert Bunsen
Frederick Banting
Andre Ampere
Winston Churchill
- 80 -
John Locke
Bronislaw Malinowski
Bible
Thomas Huxley
Alessandro Volta
Erwin Schrodinger
Wilhelm Roentgen
Louis Pasteur
Bertrand Russell
Jean Lamarck
- 70 -
Samuel Morse
John Wheeler
Nicolaus Copernicus
Robert Fulton
Pierre Laplace
Humphry Davy
Thomas Edison
Lord Kelvin
Theodore Roosevelt
Carolus Linnaeus
- 60 -
Francis Galton
Linus Pauling
Immanuel Kant
Martin Fischer
Robert Boyle
Karl Popper
Paul Dirac
Avicenna
James Watson
William Shakespeare
- 50 -
Stephen Hawking
Niels Bohr
Nikola Tesla
Rachel Carson
Max Planck
Henry Adams
Richard Dawkins
Werner Heisenberg
Alfred Wegener
John Dalton
- 40 -
Pierre Fermat
Edward Wilson
Johannes Kepler
Gustave Eiffel
Giordano Bruno
JJ Thomson
Thomas Kuhn
Leonardo DaVinci
Archimedes
David Hume
- 30 -
Andreas Vesalius
Rudolf Virchow
Richard Feynman
James Hutton
Alexander Fleming
Emile Durkheim
Benjamin Franklin
Robert Oppenheimer
Robert Hooke
Charles Kettering
- 20 -
Carl Sagan
James Maxwell
Marie Curie
Rene Descartes
Francis Crick
Hippocrates
Michael Faraday
Srinivasa Ramanujan
Francis Bacon
Galileo Galilei
- 10 -
Aristotle
John Watson
Rosalind Franklin
Michio Kaku
Isaac Asimov
Charles Darwin
Sigmund Freud
Albert Einstein
Florence Nightingale
Isaac Newton