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Who said: “Truth is ever to be found in simplicity, and not in the multiplicity and confusion of things.”
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JULY 25 – BIRTHS – Scientists born on July 25th
  Rosalind Franklin
 Born 25 Jul 1920; died 16 Apr 1958 at age 37.   quotes
Rosalind Elsie Franklin was an English physical chemist and X-ray crystallographer who contributed to the discovery of the molecular structure of deoxyribonucleic acid (DNA), a constituent of chromosomes that serves to encode genetic information. Beginning in 1951, she made careful X-ray diffraction photographs of DNA, leading her to suspect the helical form of the molecule, at least under the conditions she had used. When James Watson saw her photographs, he had confirmation of the double-helix form that he and Francis Crick then published. She never received the recognition she deserved for her independent work, but had died of cancer four years before the Nobel Prize was awarded to Crick and Watson.
Rosalind Franklin: The Dark Lady of DNA, by Brenda Maddox. - book suggestion.
Booklist for Rosalind Franklin.
  Davidson Black
 Born 25 Jul 1884; died 15 Mar 1934 at age 49.
Canadian physician and physical anthropologist who first postulated the existence of a distinct form of early man, popularly known as Peking man. In 1920 he had a position at a Peking, China, college which gave him opportunity to investigate nearby Chou K'ou-tien. In 1927 he found a single human molar which he took to be an indicator of a small-brained ancestor, dubbed Peking man. Subsequently, more teeth, skulls, bones, tools and campfire remains were found (1929-30). These are now classifieded as examples of Homo erectus.
  Morris Raphael Cohen
 Born 25 Jul 1880; died 28 Jan 1947 at age 66.   quotes
Russian-American philosopher of science.
  Sergey Vasilyevich Lebedev
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 Born 25 Jul 1874; died 2 May 1934 at age 59.
Russian chemist who developed a method for industrial production of synthetic rubber. In 1910, while researching processes by which small molecules combine to form large ones, Lebedev made an elastic rubber by polymerizing butadiene (CH2CH-CHCH2), which he obtained from ethyl alcohol. Production of polybutadiene in the Soviet Union using Lebedev's process was begun in 1932-33, using potatoes and limestone as raw materials. By 1940 the Soviet Union had the largest synthetic rubber industry in the world, producing more than 50,000 tons per year. During WW II his process of obtaining butadiene from ethyl alcohol was also used by the German rubber industry. [Image right: butadiene]
  Andrew Cowper Lawson
 Born 25 Jul 1861; died 1952 .
Canadian-U.S. geologist born in Anstruther, Fife, Scotland, who for 38 years, was professor of mineralogy and petrography at the University of California where his courses in that relatively new study of geology brought great prestige to himself and to his department. Lawson made important discoveries of Precambrian rock structures (more than 570,000,000 years old) and published revolutionary interpretations of these strata (1881). He headed the commission appointed to investigate the disastrous California earthquake of 1906. The report was a landmark in its field; the study initiated the theory of the elastic rebound of shock waves. Lawson was the first historical paleoseismologist - the correlation of historical earthquakes to specific faults, specifically those with surface rupture - who in 1908 described surface rupture on the Hayward fault during an earthquake in 1868.
  Frank Sprague
 Born 25 Jul 1857; died 25 Oct 1934 at age 77.
Frank (Julian) Sprague was an American engineer, inventor, and a pioneer in electric railway transportation. He started his career at sea in the U.S. Navy (1878). Later, he worked at the Brooklyn Navy Yard making plans for incadescent electric lamps on navy vessels, which led to joining Edison at Menlo Park (1883) He formed the Sprague Electric Railway and Motor Company in 1884, and became known as "the father of electric railway traction." when he installed the first U.S. electric trolley system (Richmond, Va., 1887). Edison took over this company in 1892. Sprague earned many patents, many for railway applications and diverse ideas such as electric toasters, electric signs, electric elevators and naval weaponry.
  Paul Langerhans
 Born 25 Jul 1847; died 20 Jul 1888 at age 40.
German physician.
  Thomas Tompion
Thumbnail - Thomas Tompion
 Baptized 25 Jul 1639; died 20 Nov 1713 at age 74.
Most famous English clockmaker of his time, especially known for watchmaking improvements. He worked closely with experimental physicist Robert Hooke, and in 1675, following Hooke's design, Tompion made one of the first English watches regulated by a balance spring. In 1695, with Edward Barlow and William Houghton, he patented the cylinder escapement (a controlling device) that allowed use of a horizontal wheel, enabling Tompion to make the first of the flat and more compact watches. [Image: Bracket clock with oak case ebony veneer, and gilt bronze mounts by Tompion, c. 1690.]
  Christoph Scheiner
 Born 25 Jul 1575; died 18 Jul 1650 at age 74.
German astronomer.

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)
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JULY 25 – DEATHS – Scientists died on July 25th
  Vincent Joseph Schaefer
Thumbnail - Vincent Joseph Schaefer
 Died 25 Jul 1993 at age 87 (born 4 Jul 1906).
American physicist and chemist whose research in meteorology and weather control introduced cloud seeding. He worked on the physics of precipitation at the General Electric (GE) Research Laboratory in Schenectady, New York. Having discovered a method of producing a snowstorm under laboratory conditions, he proved the same was possible outdoors. On 13 Nov 1946, he flew over Mount Greylock in Massachusetts, successfully seeding clouds with pellets of dry ice (solid carbon dioxide) to produce the first snowstorm initiated by man. Later, he became founder and director of Atmospheric Sciences Research Center at State University of New York in Albany.
A Field Guide to the Atmosphere, by John A. Day, Vincent J. Schaefer, et al. - book suggestion.
  Charles Stark Draper
Thumbnail - Charles Stark Draper
 Died 25 Jul 1987 at age 85 (born 2 Oct 1901).
American aeronautical engineer, educator, and science administrator who earned degrees from Stanford, Harvard, and MIT then, in 1939, became head of MIT's Instrumentation Laboratory, which was a centre for the design of navigational and guidance systems for ships, airplanes, and missiles from World War II through the Cold War. He developed gyroscope systems that stabilized and balanced gunsights and bombsights and which were later expanded to an inertial guidance system for launching long-range missiles at supersonic jet targets. He was "the father of inertial navigation." The Project Apollo contract for guiding man and spacecraft to the moon was also placed with the Instrumentation Lab.
  Herbert Calhoun Reed
 Died 25 Jul 1940 at age 66 (born 16 Oct 1873).
American chemist who was noted internationally as an analytical and consulting chemist to the leather industry and allied trades. From 1 Jan 1895 he spent 15 years as a chemist with the Stamford Mfg. Co., before establishing his own laboratory in New York City. He was one of nine leather industry chemists who founded the American Leather Chemists Association (22 Nov 1903) to establish reliable analytical methods for the commercial quality of materials used in the manufacture of leather, and to introduce scientific methods of tannery plant control. It was the outcome of a decade when a small number of chemists with a commercial interest in the product had worked to establish reliable analytical methods for analyzing the tanning extracts used in the industry, and to introduce scientific methods of tannery plant control. They devised a method of measuring the amount of tanning material absorbed by dried, ground hide. However, these formative years were still characterised by bitter disputes and wrangling among the chemists. Reed served as its secretary, and was its third president for one year. As one of the leading tanning chemists of the U.S., he wrote extensively on technical topics.« [Image: current logo of the American Leather Chemists Association (ALCA).]
  Gustav Georg Embden
 Died 25 Jul 1933 at age 58 (born 10 Nov 1874).
German physiological chemist who conducted studies on the chemistry of carbohydrate metabolism and muscle contraction and was the first to discover and link together all the steps involved in the conversion of glycogen to lactic acid (1933). In 1918 Otto Meyerhof threw considerable light on the process of cellular metabolism by showing that it involved the breakdown of glucose to lactic acid. Embden spent much time in working out the precise steps involved in such a breakdown, as did many other chemists and physiologists.The metabolic sequence from glycogen to lactic acid was later known as the Embden-Meyerhof pathway, had been worked out. In earlier work, he studied the metabolic processes of liver, laying a foundation for understanding diabetes.
  Charles Macintosh
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 Died 25 Jul 1843 at age 76 (born 29 Dec 1766).   quotes
Scottish chemist and inventor who manufactured rubberized cloth used for waterproof clothing. His father's business supplied textile dyes. Charles also entered the textile industry, with partner Charles Tennant in a cloth bleaching business. In 1799, Tennant patented a dry bleaching powder made from chlorine and slaked lime, though it may have been developed mainly by Macintosh. In the 1820's Macintosh went into partnership with a Manchester cotton manufacturer. Seeking uses for coal gasworks waste products, he utilized naptha as a solvent in his famous method of waterproofing cloth (1823) by pressing together two rubberized layers of cloth. His name remains associated with the raincoat made from such cloth. He also patented a steel-making process (1825).« [Image right: U.S. advertisement from the late 1800s. (source)]   more
  Dominique-Jean Larrey
 Died 25 Jul 1842 at age 76 (born 8 Jul 1766).
(Baron) French military surgeon in the service of Napoleon. Larrey was the first to note the contagiousness of trachoma (1802) and published the first description of trench foot (1812). He introduced to the battlefield: field hospitals, ambulance service, first-aid practices and the triage system of treating patients. Larrey introduced properly sprung horse-drawn carts to evacuate casualties quickly into newly established mobile field hospitals. From that moment on, surgeons had a reasonable chance of operating on the worst wounds before it was too late. The success of Larrey's approach earned him the position as Chief Surgeon of the Guard in all Napoleon Bonaparte's major campaigns from 1805 onwards.
  Andreas Libavius
 Died 25 Jul 1616 (born 1560).   quotes
German alchemist.

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JULY 25 – EVENTS – Science events on July 25th
  Stem cells cultured
  In 1997, it was announced that for the first time human stem cells had been cultured in a laboratory, using tissue taken from aborted human embryos. Stem cells are the basic, unspecialized cells from which all other cells in the body develop during the growth of a baby in the womb. The announcement was made at an international symposium on the ethics of human cloning and stem cells. The team of researchers at the Johns Hopkins University, Baltimore, was led by Dr. John D. Gearhart, a professor of gynecology and obstetrics. He issued the "progress report" of his research before it had been published, he said, to spark discussion about establishing guidelines for the ethical use of such cells.
  First woman space walks
  In 1984, Soviet cosmonaut Svetlana Savitskaya, made her second trip into space, during which she became the first woman to walk in space. Savitskaya carried out over three hours of experiments outside the orbiting space station Salyut Seven. She was selected in 1980 to be a cosmonaut, as part of a female team selected to upstage pending female astronaut flights on NASA's space shuttle. Savitskaya became the second woman in space in 1982. It was seven months later that  Sally Ride became the first American female astronaut in space.
  Test tube baboon
Thumbnail - Test tube baboon
  In 1983, a baboon, was the first nonhuman primate conceived in a lab dish, in San Antonio, Texas. The eggs with attached spermatozoa were transferred surgically into the oviduct of another baboon, who then gave birth to the offspring. The chief scientist for the research was Dr. Tom Kuehl.
  Test tube baby
  In 1978, in England, Louise Joy Brown, the first test tube baby was born in Oldham. She had been conceived through the technique of in-vitro fertilization. She weighed 5-lbs 12-ozs, and was delivered by Caesarean section at Oldham District General Hospital. By 25 Jul 1999, her 21st birthday, more than 300,000 babies have been born throughout the world using in vitro fertilisation (IVF), 29,000 of them in Britain. Brown is now a nursery nurse in Bristol. IVF began with Dr Robert Edwards, of Cambridge, who was keen to extend work on animals to treat women with blocked Fallopian tubes, which prevent eggs from travelling from the ovaries to the womb, where they can be fertilised, “It struck me what we should be trying to do was pluck the egg from the ovary and fertilise it in the laboratory,” he said. He collaborated with Patrick Steptoe, a gynaecologist in Oldham, who he met while lecturing at the Royal Society of Medicine. The Browns were already patients with Steptoe.
  Mars 5
  In 1973, the USSR launched Mars 5, on a Proton SL-12/D-1-e booster. It was one of several Soviet Mars probes - Mars 4, 5, 6, and 7 - launched in Jul-Aug 1973. The Mars 5 mission was to orbit Mars, which was achieved on 12 Feb 1974. Each orbit took about 25-hr. It was designed to return information on the composition, structure, and properties of the martian atmosphere and surface. However, after only 22 orbits, the mission ended prematurely due to loss of pressurization in the transmitter housing. Before the failure, data for a small portion of the martian southern hemisphere was captured with about 60 images forwarded over a nine day period. The probe also sent more measurements made by other instruments.«
The Scientific Exploration of Mars, by Fredric W. Taylor. - book suggestion.
  Veterinary surgery
  In 1965, the first U.S. surgical operation on a bull to correct a sperm block was performed. The $176,000 Aberdeen-Angus bull, named Linderis Evulse, was owned by the Black Watch Farms, Wappinger Falls, NY. During the operation the animal was strapped on a hydraulic operating table. The veterinarians were Dr. James Hicks and Dr. Donald F. Walker at the Auburn University School of Veterinary Medicine, Auburn, Alabama. The Aberdeen-Angus evolved during the early part of the 19th century from the hardy, black, polled cattle which populated North-East Scotland. George Grant first established the breed in the U.S. with four Angus bulls imported from Scotland to Kansas in 1873.
  Nuclear treaty
  In 1963, the United States, the Soviet Union and Britain initialed a treaty in Moscow prohibiting the testing of nuclear weapons in the atmosphere, in space or underwater.
  In 1959, a hovercraft crossed the English Channel for the first time. Having been shipped to France by tender, the world’s first all metal hovercraft, SR.N1, crossed the Channel between Calais and Dover in 2 hours 3 minutes on 25th July with Captain Peter Lamb piloting, Mr John Chaplin as navigator and the inventor, Mr. (later Sir) Christopher Cockerell in his own words as “moveable ballast” on board. It was 50 years to the day that Louis Blériot made the first crossing of the Dover Strait by aeroplane.
  First underwater nuclear test
  In 1946, the U.S. detonated the "Baker" atomic bomb during "Operation Crossroads" at Bikini Atoll in the Pacific. This, the first underwater nuclear explosion, was to test results on a naval fleet of war-surplus and captured enemy vessels. The bomb, encased in a watertight steel caisson, was suspended 90 feet below the landing ship LSM-60 and detonated by radio signals from a command ship at 8:45 am. The explosion created a massive column of steam and water, and a series of huge waves. After second, the first wave struck target ship Carrier Saratoga and swept it 800 yards away. It sank eight hours later. The 90-foot wave also sank Battleship Arkansas, three submarines (Pilotfish, Apogon, Shipjack) and the fuel barge YO-160. [Images: Top: bomb cloud. Bottom: part of the target fleet before explosion.]
  Greetings telegram
  In 1935, the first greetings telegram was sent in Britain. Denmark introduced the first greetings telegraph service with an ornamental telegram form in 1907. When Britain offered such a service, it was so successful that when the service was suspended in wartime, 1943, the greetings service at 9d for 9 words, had an annual traffic flow of 9 million messages with no less than 23 new issues of forms in the space of 8 years. Greetings telegram forms and colourful envelopes were designed to catch the eye of the addressee; it was well known for the recipient of such a greetings telegram to be more likely to preserve that telegram for a keepsake - but less inclined to do likewise with a greetings card after the occasion. [Image: First U.K. St. Valentines Telegram form issued 14 Feb 1936.]
  First English Channel flight
  In 1909, French aviator Louis Blériot flew across the English Channel in a monoplane, traveling from Calais, France, to Dover, England, in 37 minutes. This was the world's first international overseas airplane flight. Blériot made the historic crossing after Lord Northcliffe, the owner of the Daily Mail, offered £1,000 to the first successful pilot. On 25 Jul 1999, a Swedish pilot re-enacted the first cross-Channel flight 90 years after Louis Blériot's historic journey. Mikael Carlson, 39, landed the original Blériot XI plane on the cliffs at Dover 33 minutes after taking off from France - seven minutes faster than Bleriot's time. He said: "This was the first big heroic flight when the century was young, and I wanted to celebrate the end of this century in the same way it started."
  Perforated wrapping paper
  In 1871, the first U.S. patent for perforated wrapping paper was awarded to Seth Wheeler of Albany, NY (No. 117,355). The paper was wound into rolls and could easily be torn off at the perforations. It was claimed that the fibers left between the perforations were sufficient for holding the sheets together as wound on the roll. In this way, the cost of cutting, counting and bundling stacks of pre-cut sheets was to be saved, together with making storage more convenient, and saving the paper from drying and becoming brittle by exposure to the atmosphere. Paper was already manufactured in rolls; only the step of perforation was added in its production, either with a row of holes or short cuts.
  In 1871, the first U.S. patent for a carousel was issued to Willhelm Schneider of Davenport, Iowa (117,336). It was described as a two-story "'carrousel' or rotary pavillion used in public parks or other places of amusement." A staircase within the central supporting frame enabled access to the upper story. Radial partitions could provide separate "apartments" with a sofa, imitation horse or other seats. It could be turned by a person or other apparatus. However, it was not very practical or successful*. Carousels had been popular for a long time. The earliest* on record was at a fair held at Philippopolis, Turkey on 17 May 1620. The first* on record in England was at the St. Bartholomew Fair in 1729.
  Paper collar
  In 1854, Walter Hunt of New York City was awarded the first U.S. patent for a paper shirt collar (No.11,376). Very thin white paper was pasted on both sides of a base of thin white cotton muslin. After being cut out or stamped out of this material, such collars could be pressed between heated forms to the shape of the neck. To guard against the effect of perspiration, the collars were then varnished with a colorless bleached shellac which also enabled cleaning by wiping with a damp cloth. It was expected the collar could be made at less than the cost of laundering a linen shirt collar. Walter Hunt (1796-1859) was a prolific inventor, best known for the safety pin and as developer of the first repeating rifle.
  Five-needle telegraph demonstrated
  In 1837, the five-needle telegraph was demonstrated by English inventors, Charles Wheatstone and William Fothergill Cooke. They ran a six-wire telegraph line 2.4-km from Euston to Camden Town along the Great Western Railway Company railway track. They successfully transmitted and received messages. Wheatstone provided the technological skill and is better remembered in the history of the telegraph while Cooke had the business acumen. This first patent (1837) was impractical because the code used simultaneous combinations of five keys, and so was rather cumbersome, limited to only twenty letters (J, C, Q, U, X and Z were omitted). By 1845, they patented the more important single-needle electric telegraph.«
Sir Charles Wheatstone, by Margaret Wilson and Brian Bowers (Ed.). - book suggestion.
Booklist for Charles Wheatstone.
  Stephenson's first locomotive
  In 1814, George Stephenson demonstrated the first successful flanged-wheel adhesion steam locomotive in England, the Blucher. He’d been chief engineer at Killingworth Colliery, supervising their stationary steam engines. He proposed that a steam locomotive could haul coal from the mine at less cost and replace horse-drawn wagons. One of the mine’s directors, Lord Ravensworth, believed in him, and funded Stephenson to design and build the Blucher. He improved on ideas of earlier inventors, such as Richard Trevithick (1803) and William Hedley (1813). Stephenson soon made a second, more efficient engine (1815). He went on to build his famous Rocket (1829) which won the Rainhill Trials for the new Liverpool to Manchester railway
  Savery's steam-driven water pump
  In 1698, Thomas Savery received a British patent (No. 356) for a “New Invention for Raiseing of Water and Occassioning Motion to all sorts of Mill Work by the Impellent Force of Fire.” It was the first to harness steam for pumping water, used in draining mines, serving towns or supplying water to mills. Steam in a vessel was condensed by an external spray of cold water. A partial vacuum resulted and raised water from a lower sump. As high-pressure steam refilled the vessel, the water was forced to a higher level. His major problem was containing high-pressure steam since available construction materials were weak. The 14 year term was extended to 35 by Parliament in 1699. He also held a patent for ship propulsion (No. 347, 10 Jan 1696).« [Image: diagram of Savery's Miner's Friend steam powered pump.]

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