| FEBRUARY 23 - BIRTHS | |
| Shigefumi Mori | |
(source) |
 Born 23
Feb 1951
Japanese mathematician who has made important contributions to the field of algebraic geometry. His major work, in which he proved the existence of minimal models for all three-dimensional algebraic varieties (Jan 1988), has been dubbed Mori's Program. Within ten years since his first published paper, Mori had thereby completed what many said could never be done. In 1979, Mori published his first major results, a proof of the Hartshorne conjecture, which stated that a certain class of algebraic varieties are projective in nature. In other words, these varieties or sets of solutions to given polynomial equations could be described using projective geometry. He was awarded the Fields Medal in 1990 for his work in algebraic geometry. |
| Allan MacLeod Cormack | |
(source) |
Born 23
Feb 1924; died 7 May 1998.
South African-born American physicist who formulated the mathematical algorithms that made possible the development of a powerful new diagnostic technique, the cross-sectional X-ray imaging process known as computerized axial tomography (CAT) scanning. He first described this in two papers in 1963 and 1964. X-ray tomography is a process by which a picture of an imaginary slice through an object (or the human body) is built up from information from detectors rotating around the body. For this work, he was awarded a share of the 1979 Nobel Prize. Cormack was unusual in the field of Nobel laureates because he never earned a doctorate degree in medicine or any other field of science. |
| Casimir Funk | |
(source) |
Born 23
Feb 1884; died 20 Nov 1967.
Polish-American biochemist who coined the term "vitamine." In 1912, as had previously been proposed by Sir Frederick Hopkins, Funk pursued the idea that diseases such as beriberi, scurvy, rickets and pellagra were caused by lack of vital substances in the diet. His investigation of Eijkman's anti-beriberi factor had shown that it was an amine (an organic substance wih molecules containing the -NH2 amine group). Funk assumed (though incorrectly) that all similar substances were also amines, and he named such factors vitamines ("life-amines"). When later it was discovered that not all the factors were amines, the spelling of the word was changed to "vitamin." Funk isolated nicotinic acid from rice polishing, later used against pellagra by Warburgh and Elvehjem. |
| Agnes Arber | |
(source) |
Born 23
Feb 1879; died 22 Mar 1960.
(née Robertson) British botanist noted chiefly for her studies in comparative anatomy of plants, especially monocotyledons. Her interest in botany began in her schooldays in London. Her first book, Herbals: Their Origin and Evolution, published in 1912 and rewritten in 1938, became a standard textbook of the period. She was the first woman botanist to be made a fellow of the Royal Society, Britain's oldest and most important scientific society. Her later works were Water Plants: A Study of Aquatic Angiosperms (1920), Monocotyledons (1925), and The Gramineae: A Study of Cereal, Bamboo and Grass (1934). Arber also wrote, between 1902 and 1957, numerous articles on comparative anatomy. |
| Charles Joseph Chamberlain | |
1926(source) |
Born 23
Feb 1863; died 5 Feb 1943.
U.S. botanist whose major area of research was the cycad genera, palmlike, cone-bearing plants intermediate in appearance and structural features between tree ferns and palms. Before his work, little was known concerning the life histories, distribution, ecology, and diversity of cycads and other primitive seed plants. Making visits to Mexico, Fiji, New Zealand, Australia, and South Africa and Cuba (1904-22), Chamberlain collected specimens and gained information on critical stages in such plant development. Studying the primitive gymnosperms of the cycad family enabled him to postulate a course of evolutionary development for the spermatophyte (seed plant) ovule and embryo and led to speculation about a cycad origin for angiosperms (flowering plants). |
| FEBRUARY 23 - DEATHS | |
| Dickinson W(oodruff) Richards | |
(source) |
 Died
23 Feb 1973 (born 30 Oct 1895)
American physiologist who was one of three who shared the 1956 Nobel Prize for Physiology or Medicine "for their discoveries concerning heart catheterization and pathological changes in the circulatory system". Richards helped develop the technique by which a catheter (a flexible tube) could be threaded through a vein into the heart to withdraw blood samples to determine cardiac abnormalities. In addition, it permits the measurement of blood pressure, blood flow or gas concentrations in various parts of the cardiac circulatory system (atrium, ventricles, or artery). This gives valuable information in the treatment of heart disease, defect or injury. Richards worked with André F. Cournand building on the original work of Werner Forssmann.« |
| Dr. John F. Mahoney | |
(source) |
Died
23 Feb 1957 (born 1 Aug 1889)
American physician who developed penicillin treatment of syphilis. He established the Venereal Disease Research Center on Staten Island, N.Y. for the U.S. Public Health Service for laboratory and clinical studies of venereal disease. Studies made with his colleagues clarified the mechanism and rate of penetration into tissues by the spirochete, the microorganism that causes syphilis and also improved diagnostic serologic tests. With an initial supply of penicillin, they confirmed other researchers' work on the efficacy of penicillin in the treatment of sulfonamide-resistant gonorrhea. Mahoney then went further in 1943, to prove that penicillin was highly effective against primary syphilis. He received the Lasker Award (1946) for this work.« [Image: electron micrograph drawing of spirochetes (x18,240) by Merck Penicillin Products.] |
| John Robert Gregg | |
(source) |
Died 23 Feb 1948 (born 17 Jun 1867)
Irish-born American inventor of a popular shorthand system named for him. He first introduced his system in 1888 in the pamphlet Light-Line Phonography published in Liverpool, England. By 1893, he had published Gregg Shorthand in America where it was soon taught in public schools throughout the U.S., and adapted to several languages. The Gregg system modeled the mechanics and positioning of traditional writing. He published dozens of textbooks on the subject from 1880-1920. [Image right: examples of Gregg alphabet] |
| Leo Hendrik Baekeland | |
(source) |
Died
23 Feb 1944 (born 14 Nov 1863)
Belgian-born U.S. industrial chemist who invented the first thermosetting plastic, Bakelite, that did not soften when heated. His first successful invention was Velox (in the 1890's), a photographic paper that could be used with artificial light rather than sunlight, which he sold in1899 to George Eastman for $1 million. He then experimented to find a synthetic substitute for shellac, a useful insulator of wires in electric coils. Eventually, he was able to control heat and pressure for a formaldehyde-phenol reaction. By 1909, he displayed the world's first fully synthetic plastic, which could be used not only for insulators, but moulded into buttons, knobs and countless other items. With this patented product, he helped found the modern plastics industry.« |
| Sophus Otto Müller | |
(source) |
Died
23 Feb 1934 (born 24 May 1846)
Danish paleontologist who was prominent in the study of Bronze and Iron ages and Oriental influence on prehistoric Europe. In the late 1800s, he discovered and excavated burial mounds in central Jutland, Denmark, that represented the first evidence of the Neolithic battle-axe cultures of the later Middle Neolithic Periods in Scandinavia. He identified chronological sequences of the single graves within these barrows. The antiquities he recovered from them included well-proportioned battle-axes, flint axes, amber beads, beakers, and cups.« |
| Jean-Gaston Darboux | |
(source) |
Died
23 Feb 1917 (born 14 Aug 1842)
French mathematician whose work on partial differential equations introduced a new method of integration (the Darboux integral) and contributed to infinitesimal geometry. He wrote a paper in 1870 on differential equations of the second order in which he presented the Darboux integral. In 1873, Darboux wrote a paper on cyclides and between 1887-96 he produced four volumes on infinitesimal geometry, including a discussion of one surface rolling on another surface. In particular he studied the geometrical configuration generated by points and lines which are fixed on the rolling surface. He also studied the problem of finding the shortest path between two points on a surface.« |
| Friedrich von Esmarch | |
(source) |
Died
23 Feb 1908 (born 9 Jan 1823)
German surgeon who was the first to introduce a first-aid kit and triage on the battlefield. He introduced first aid training for both military and civilian personnel. His handbooks of military surgical techniques were used extensively as the best on the topic. The Esmarch bandage is a triangular piece of linen or cotton, with a long side about 4 ft. It can be used folded or open, and applied in 32 different ways. Esmarch insisted that every soldier carry one in battle for temporary dressing and field-work. Esmarch also invented an apparatus, using a narrow hard rubber tourniquet with a chain fastener to control bleeding in tying off an extremity in such a way that it is made bloodless. When used during amputation, being bloodless made it easier to operate on a limb. |
| Hugh Burgess | |
(source) |
Died
23 Feb 1892 (born c. 1825)
British-born American co-inventor (1852, with Charles Watt) of the "soda" process to produce paper from wood pulp, digesting wood shavings by cooking them in a caustic soda (sodium hydroxide) solution. In 1719, Frenchman Rene de Reaumur suggested using wood to make paper, similar to the paper-like material created by North American wasps to build their nests. By 1850, when a German, Friedrich Keller, devised a grinding method to make paper from wood, the product had poorer quality than rag pulp. Burgess and Watt devised a way to separate the cellulose from the intercellular lignin matter (to render the cellulose fit for being made into paper) and to produce fibres of proper length for immediate felting into paper.« |
| Carl Friedrich Gauss | |
(source) |
Died
23 Feb 1855 (born 30 Apr 1777)
German mathematician who transformed nearly all areas of mathematics, for which his talent showed from a very early age. For his contributions to theory in magnetism and electricity, a unit of magnetic field has been named the gauss. He devised the method of least squares in statistics, and his Gaussian error curve remains well-known. He anticipated the SI system in his proposal that physical units should be based on a few absolute units such as length, mass and time. In astronomy, he calculated the orbits of the small planets Ceres and Pallas by a new method. He invented the heliotrope for trigonometric determination of the Earth's shape. With Weber, he developed an electromagnetic telegraph and two magnetometers.«  Carl
Friedrich Gauss: Titan of Science, by G. Waldo Dunnington. |
| Étienne-Louis Malus | |
(source) |
Died
23 Feb 1812 (born 23 June 1775)
French physicist who discovered that light, when reflected, becomes partially plane polarized; i.e., its rays vibrate in the same plane. He served in Napoleon’s corps of engineers, fought in Egypt, and contracted the plague during Napoleon’s aborted campaign in Palestine. Posted to Europe after 1801, he began research in optics. In 1808, he discovered that light rays may be polarized by reflection, while looking through a crystal of Iceland spar at the windows of a building reflecting the rays of the Sun. He noticed that on rotating the crystal the light was extinguished in certain positions. Applying corpuscular theory, he argued that light particles have sides or poles and coined the word "polarization." |
| Andrea Cesalpino | |
(source) |
Died
23 Feb 1603 (born 6 Jun 1519)
Italian physician, philosopher, and botanist who sought a philosophical and theoretical approach to plant classification based on unified and coherent principles rather than on alphabetical sequence or medicinal properties. He helped establish botany as an independent science. In 1555, he succeeded Luca Ghini as director of the Pisan botanic garden. His book De plantis libri XVI (1583) starts with botanical principles. Following Aristotle's division of plants into trees, shrubs, shrubby herbs, and herbs, Cesalpino's pioneering classification concentrated on fruits and seeds, neglecting broader affinities. The greater part of his book contains descriptions of about 1500 plants, but with less advice on their uses than the herbalists provided. |
| FEBRUARY 23 - EVENTS | |
| Cloned sheep | |
(source) |
In 1997, the successful cloning
of an adult mammal was announced: a female lamb named "Dolly" that was
born
5 Jul 1996. The accomplishment of a group of scientists supervised by Ian
Wilmut at Roslin Institute, Edinburgh, Scotland, was primarily the
work of biologist Keith Campbell. Dolly was the first mammal ever successfully
cloned
from a cell from an adult animal. Using microscopic needles, scientists
had replaced
the nucleus of an egg cell with the nucleus from a parent udder cell. The
resulting embryo was implanted into the womb of a third, surrogate sheep.
Dolly's DNA was matched to show she was a clone. Dolly lived until
14 Feb 2003, when she was put down due to the effects of a progressive
lung disease.«
The
Second Creation: Dolly and the Age of Biological Control,
by Ian Wilmut, et al. |
| Supernova | |
|
In 1987, supernova 1987A in LMC was first seen. The brightest of the twentieth
century, it was the first supernova visible with the naked eye since 1604. |
|
| Black American patent | |
|
In 1960, black American inventor, F. M. Jones was issued a U.S. patent
for a "Thermostat and Temperature Control System" (No. 2,926,005).
The
Inventive Spirit of African Americans: Patented Ingenuity,
by Patricia Carter Sluby. |
|
| Polio vaccine | |
|
In 1954, the first mass inoculation of children against polio with the
Salk vaccine began in Pittsburgh, Pennsylvania. |
|
| Rocket air mail | |
|
In 1936, the first U.S. rocket air mail flight was made at Greenwood Lake,
N.Y. in the Gloria. This rocket was 11-ft long with a 15-ft wing
spread, fueled by alcohol and liquid oxygen. It carried 4,323 letters and
1,826 postcards. Each cover was franked with special rocket stamps in addition
to the regular postage stamps. The flight was sponsored by Frido W. Kessler.
The rocket inventors were Willey Ley, Louis Goodman and Hugh Franklin Pierce. |
|
| Aluminium isolated | |
 |
In 1886, Charles M. Hall, a young U.S.
chemist, completed his electrolytic process for the separation of aluminum
from its ore, a mere eight months since he graduated from college. He dissolved
the alumina ore in a bath of cryolyte (a mineral containing flourine, sodium
and aluminum) and passed electric current through the solution. The process
he patented (2 Apr 1889) was the
first to become an inexpensive, commercial application. Production began
in Nov 1888 by the Pittsburgh Reduction Company started , which later became
ALCOA, the Aluminum Company of America.  |
| Tootsie Roll | |
|
In 1896, the Tootsie Roll was introduced by Austrian immigrant Leo Hirshfield
to the U.S. In a small store in New York City, he began producing his a
chocolaty, chewy candy, which he named after a nickname of "Tootsie"
for his five-year-old daughter, Clara. He was America's first candy maker
to individually wrap penny candy. By 1905, production moved to a four-story
factory in New York. During World War II, Tootsie Rolls were added to American
soldiers' rations because of their ability to withstand severe weather
conditions and give quick energy. Tootsie Rolls are made from a base of
sugar, corn syrup, soy-bean oil, skim milk and cocoa. Current production
is over 49 million pieces a day.« |
|
| Diesel engine patent | |
|
In 1893, Rudolf Diesel received a German patent for the diesel engine.
His engine burns fuel oil rather than gasoline, and uses high compressed
of the gases in the cylinder rather than a spark to ignite the fuel. Diesel
engines were used widely in Europe for their efficiency and power, and
are still used today in most heavy industrial machinery. Diesel cars never
caught on in the U.S., partly because the diesel engine’s greater efficiency
is counter-balanced by its higher emissions of soot, odor, and air pollutants.
However, some environmentalists argue that in spite of the diesel engine’s
exhaust pollution, its fuel efficiency may make it more environmentally
sound than the gasoline engine in the long run. |
|
| Black American patent | |
|
In 1892, black American inventor, Peter D. Smith of Springfield, Ohio,
was issued a U.S. patent for a "Grain Binder" (No. 469,279)
which was a way to form a binding-rope for the sheaf from a wisp or portion
of the cut grain and a mechanism to be applied to a reaper to perform this,
knot the rope around the sheaf and eject it.
Great
Discoveries and Inventions by African-Americans, by David
M. Foy |
|
| Black American patent | |
|
In 1892, black American, Henry A. Bowman of Worcester, Mass., was issued
a U.S. patent for a "Method for Making Flags" (No. 469,395).
Bowman devised an easy method to apply emblems or stars upon the field
fabric of flags whereby those affixed on opposite sites of the field would
correspond in position. He used a cut star or emblem which was stitched
through the fabric and an unformed blank on the reverse, using a
zigzag stitch over-seaming the raw-cut edges. The blank on the reverse
could then be cut away to the outline of the seaming stitches.
Great
Discoveries and Inventions by African-Americans, by David
M. Foy |
|
| The Chemical Society of London | |
|
In 1841, the Chemical Society of London held its first organizational meeting.
This, the first association for chemists that lasted 100 years, was established
for the promotion of chemistry, by communications and discussions, and
by collecting a library, museum, and standard instruments. Subsequently,
three members would recommend a candidate, his certificate suspended in
the room during three ordinary meetings, and then elected to membership
by having three-fourths of the votes in his favour. This had vestiges of
an older chemical society which began meeting in 1780 for the same ends
at the Chapter Coffeee House. In 1980, it merged with the Royal Institute
of Chemistry, and two others, to become the Royal
Society of Chemistry.« |
|
| Cotton mill | |
|
In 1813, the first cotton
mill in the world in which the whole process of cotton manufacturing
from spinning to weaving was carried on by power was incorporated in Waltham,
Mass., U.S. with a capital of $100,000 as the Boston Manufacturing Company,
later known as the Waltham Company. Construction of the mill began later
the same year in Waltham, located on the north bank of the Charles River,
which it used for water power, and was completed by Nov 1813. America's
Industrial Revolution was in progress. By the following year, cloth manufactured
in Waltham was for sale in Boston. The factory grew rapidly and soon employed
over 200 workers. Labour was paid a fixed wage, and various groups were
departmentalized.« |
|
