| JANUARY 15 - BIRTHS | |
| Edward Teller | |
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Hungarian-born American nuclear physicist who participated in the production of the first atomic bomb (1945) and who led the development of the world's first thermonuclear weapon, the hydrogen bomb. After studying in Germany he left in 1933, going first to London and then to Washington, DC. He worked on the first atomic reactor, and later working on the first fission bombs during WW II at Los Alamos. Subsequently, he made a significant contribution to the development of the fusion bomb. His work led to the detonation of the first hydrogen bomb (1952). He is sometimes known as "the father of the H-bomb." Teller's unfavourable evidence in the Robert Oppenheimer security-clearance hearing lost him some respect amongst scientists. |
| R.B. Braithwaite | |
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Richard Bevan Braithwaite was a British philosopher, who trained in physics and mathematics, but turned to the philosophy of science. He examined the logical features common to all the sciences. Each science proceeds by inventing general principles from which are deduced the consequences to be tested by observation and experiment. Braithwaite was concerned with the impact of science on our beliefs about the world and the responses appropriate to that. He wrote on the statistical sciences, theories of belief and of probability, decision theory and games theory. He was interested in particular with the laws of probability as they apply to the physical and biological sciences.« |
| Artturi Ilmari Virtanen | |
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Finnish biochemist whose investigations directed toward improving the production and storage of protein-rich green fodder, vitally important to regions characterized by long, severe winters, brought him the Nobel Prize for Chemistry in 1945. The AIV method, named for his initials, was storing green fodder in an acid medium to prevent spoilage and retain nutritious nitrogenous material. He found that a mixture of hydrochloric and sulfuric acid was adequate as long as its strength was kept within certain precise limits (a pH of about four). In 1929, he found that cows fed such silage gave milk indistinguishable in taste from that of cows fed on normal fodder, while as rich in vitamins A and C. |
| Lewis M. Terman | |
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Lewis M(adison) Terman was a U.S. psychologist who pioneered individual intelligence tests. During WW I, he was involved in mass testing of intelligence for the U.S. army. He expanded an English version of the French Binet-Simon intelligence test with which he introduced the IQ (Intelligence Quotient), being a ratio of chronological age to mental age times 100. (Thus an average child has an IQ of 100). He wrote about this metric in The Measurement of Intelligence (1916). He made a long-term study of gifted children (with IQ above 140) examining mental and physical aspect of their lives reported in the multi-volume Genetic Studies of Genius (1926-59).« |
| Henry Livingstone Sulman | |
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British metallurgist, one of the originators of the froth flotation process for concentrating ores preliminary to the extraction of metal (with H.F.K. Picard, U.S. patent No. 835120, 6 Nov 1906). In this latter method, crude ore is ground to a fine powder and mixed with water, frothing reagents, and collecting reagents. These reagents, such as oil or fatty acids, are chosen for a preferential affinity for metalliferous matter over the waste material (gangue). When air is blown through the mixture, mineral particles cling to the bubbles, which rise to form a froth on the surface, whereas gangue settles to the bottom. The froth is skimmed off, and processed. Sulman had previously worked on several methods for the extraction of gold, including treatment with cyanogen bromide. |
| Sofya Kovalevskaya | |
Sofya Vasilyevna Kovalevskaya was a mathematician and novelist who made valuable contributions to the theory of differential equations. |
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| Josef Breuer | |
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Austrian physician and physiologist whose cathartic method was acknowledged by Sigmund Freud and others as the principal forerunner of psychoanalysis. Breuer found (1880) that he had relieved symptoms of hysteria in a patient, Bertha Pappenheim, (called Anna O. in his case study), after he had induced her to recall past unpleasant experiences under hypnosis. By describing her traumatic experiences and feelings about them to Breuer she seemed to get some relief from debilitating symptoms such as partial paralysis and hallucinations. Although Breuer's treatment was not nearly as successful as he and Freud claimed, she eventually overcame her symptoms to become an innovative social worker and a leader of the women's movement in Germany. |
| Warren De la Rue | |
English pioneer in astronomical photography, the method by which nearly all modern astronomical observations are made. |
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| Heinrich Daniel Ruhmkorff | |
c. 1850 (source) |
German mechanic who, as an instrument maker in Paris, invented the Ruhmkorff coil, his version of the induction coil (after Nicholas Joseph Callan's earlier invention of 1836). Ruhmkorff's induction coil could produce sparks over 1 ft (30 cm) in length, and became popular for energizing discharge tubes, especially those for generating X-rays (discovered by Roentgen, 1895). The device uses a primary coil and iron core concentric with a secondary coil with a large number of turns. By using a contact breaker giving abrupt and rapid interruptions in the primary coil current, a concentrated, changing magnetic field produced a high voltage in the secondary coil. He also invented a thermo-electric battery in 1844.« |
| William Starling Sullivant | |
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American botanist who was the foremost U.S. bryologist in his time. Sullivant graduated in the same year his father died, and took over his surveying business. He began studying and the plant life of central Ohio and published A Catalogue of Plants, Native and Naturalized, in the Vicinity of Columbus, Ohio (1840). When he expanded his interest to the bryophytes (mosses and liverworts), he cataloged not only specimens from the U.S., but also Central America, South America, and various Pacific Ocean islands. He was elected to the National Academy of Sciences in 1872. The moss Sullivantia Ohioensis was named in his honour.« |
| William Prout | |
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English chemist and biochemist noted for his discoveries concerning digestion, metabolic chemistry, and atomic weights. He is best known for formulating Prout's hypothesis (1815) which states that the atomic weights of all elements are exact multiples of the atomic weight of hydrogen. At that time the atomic weight of hydrogen was taken to be 1.0, the hypothesis implied that all atomic weights would be whole numbers. In 1818, he isolated urea and uric acid for the first time. Six years later, he found hydrochloric acid in the digestive juices of the stomach. He was the first scientist (1827) to classify the components of food into the three main divisions of carbohydrates, fats and proteins. In 1920, Rutherford named the proton after Prout. |
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| JANUARY 15 - DEATHS | |
| Kenneth Vivian Thimann | |
British-born plant physiologist who isolated and purified the plant hormone auxin and identified it as a chemical messenger with principal roles in regulating plant growth. |
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| Oscar Auerbach | |
American pathologist whose research showing that cigarette smoking was causally related to lung cancer, based on his examination of thousands of lung tissue samples, gained national prominence in the first Surgeon General's Report on Smoking and Health in 1964. |
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| William T. Piper | |
American manufacturer of small aircraft, best known for the Piper Cub, a two-seater that became the most popular family aircraft. He earned the sobriquet "the Henry Ford of Aviation" for his efforts to popularize air travel. In WW II, Piper delivered more than 5,600 Piper Cubs, long popular as a training plane, to the U.S. government for use as special personnel planes, for photoreconnaissance, and as artillery spotters. Because of their low landing speed, 20 mph (32 kph) and high maneuverability, the Pipers easily eluded enemy fighters. In addition to the Piper Cub, the company manufactured light to medium-sized aircraft for use as business planes. |
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| Henri-Alexandre Deslandres | |
French physicist and astrophysicist who in 1894 invented a spectroheliograph, an instrument that photographs the Sun in monochromatic light. (About a year earlier George E. Hale had independently invented a spectroheliograph in the United States.) From 1886 to 1891 he studied the spectra of radiation emitted by molecules. Joining the Paris Observatory in 1889, he turned his energies to astrophysics, first studying molecular spectra and then the spectra of planets, the Sun, and other stars. |
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| Alpheus Hyatt | |
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U.S. zoologist and paleontologist who studied invertebrate fossil records, the evolution of the cephalopods (a class of mollusks including squids and octopuses) and the development of primitive organisms. Along with E. Cope, he was the most prominent American neo-Lamarckian. Based on the analogy of ontogeny with phylogeny, Hyatt claimed that lineages, like individuals, had cycles of youth, old age, and death (extinction). Decline was programmed in. As maturity leads to old age, the best individuals die, leaving the worst to see the end. This idea became the bulwark of orthogenetic theories in the U.S. Hyatt was the founder and first editor of the American Naturalist, and first president of Woods Hole laboratory. |
| Jean-Baptiste-Julien d' Omalius d'Halloy | |
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Belgian geologist who was an early proponent of evolution. From his youth he pursued geological researches. He was one of the pioneers of modern geology who determined the stratigraphy of the Carboniferous and other rocks in Belgium and the Rhine provinces, and also made detailed studies of the Tertiary deposits of the Paris Basin. As noted by Charles Darwin in the preface of Origin of the Species: "In 1846 the veteran geologist ... Halloy published ... his opinion that it is more probable that new species have been produced by descent with modification than that they have been separately created: the author first promulgated this opinion in 1831." Even in his ninety-first year Halloy made a scientific expedition alone, which exertion contributed to his death. |
| John Landen | |
British mathematician who made important contributions on elliptic integrals. |
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| JANUARY 15 - EVENTS | |
| Razing of Jerusalem | |
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| Spacecrafts dock | |
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| Solar heated house | |
| All glass building | |
| Three element vacuum tube | |
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| Dental inlays | |
| Rotary dining table patent | |
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| Newspaper | |
| Elevator | |
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| Newspaper line drawing | |
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| Top hat | |
| British Museum | |
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