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1 Dagron, Prudent René-Patrice
SUBJECT AREA: Photography, film and optics[br]b. 1819 Beaumont, Franced. June 1900 Paris, France[br]French photographer who specialized in microphotography.[br]Dagron studied chemistry, but little else is known of his early career. He was the proprietor of a Paris shop selling stationery and office equipment in 1860, when he proposed making microscopic photographs mounted in jewellery. Dagron went on to produce examples using equipment constructed by the optician Debozcq. In 1864 Dagron became one of the celebrities of the day when he recorded 450 portraits on a single photograph that measured 1 mm3. The image was viewed by means of a tiny magnifying lens popularly known as a "Stanhope" after its supposed inventor, the English Lord Charles Stanhope. The great demand for Stanhoped jewellery soon allowed Dagron to build a factory for its manufacture. Dagron's main claim to fame rests on his work during the Franco-Prussian War. At the siege of Paris, Dagron was ballooned out of the city to organize a carrier-pigeon communication service. Thousands of microphotographed dispatches could be carried by a single pigeon, and Dagron set up a regular service between Paris and Tours. In Paris the messages from the outside world were enlarged and projected onto a white wall and transcribed by a team of clerks. After the war, Dagron dabbled in aerial photography from balloons, but his interest in microphotography continued until his death in 1900.[br]Further ReadingG.Tissandier, 1874, Les Merveilles de la photographie, Paris (a contemporary account of Dagron's work during the siege of Paris).H.Gernsheim and A.Gernsheim, 1969, The History of Photography, rev. edn, London.JWBiographical history of technology > Dagron, Prudent René-Patrice
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2 Dancer, John Benjamin
SUBJECT AREA: Photography, film and optics[br]b. 1812 Englandd. 1887 England[br]English instrument maker and photographer, pioneer of microphotography.[br]The son of a scientific instrument maker, Dancer was educated privately in Liverpool, where from 1817 his father practised his trade. John Benjamin became a skilled instrument maker in his own right, assisting in the family business until his father's death in 1835. He set up on his own in Liverpool in 1840 and in Manchester in 1841. In the course of his career Dancer made instruments for several of the leading scientists of the day, his clients including Brewster, Dalton and Joule.Dancer became interested in photography as soon as the new art was announced in 1839 and practised the processes of both Talbot and Daguerre. It was later claimed that as early as 1839 he used an achromatic lens combination to produce a minute image on a daguerreotype plate, arguably the world's first microphotograph and the precursor of modern microfilm. It was not until the introduction of Archer's wet-collodion process in 1851 that Dancer was able to perfect the technique however. He went on to market a long series of microphotographs which proved extremely popular with both the public and contemporary photographers. It was examples of Dancer's microphotographs that prompted the French photographer Dagron to begin his work in the same field. In 1853 Dancer constructed a binocular stereoscopic camera, the first practicable instrument of its type. In an improved form it was patented and marketed in 1856.Dancer also made important contributions to the magic lantern. He was the first to suggest the use of limelight as an illuminant, pioneered the use of photographic lantern slides and devised an ingenious means of switching gas from one lantern illuminant to another to produce what were known as dissolving views. He was a resourceful innovator in other fields of instrumentation and suggested several other minor improvements to scientific apparatus before his working life was sadly terminated by the loss of his sight.[br]Further ReadingAnon., 1973, "John Benjamin Dancer, originator of microphotography", British Journal of Photography (16 February): 139–41.H.Gernsheim and A.Gernsheim, 1969, The History of Photography, rev. edn, London.JW -
3 Photography, film and optics
See also: INDEX BY SUBJECT AREA[br]Ding HuanGabor, DennisKlic, KarolLippershey, HansMarton, LadislausTournachon, Gaspard FélixBiographical history of technology > Photography, film and optics
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Dagron — ist der Nachname von: Alfonso Gumucio Dagron (* 1950), bolivianischer Schriftsteller Gilbert Dagron, französischer Byzantinist René Dagron (1813–1900), französischer Chemiker, Fotograf und Erfinder des Mikrofilms Diese Seite ist eine Begriffskl … Deutsch Wikipedia
Dagron — Le nom est surtout porté dans la Seine et Marne, on le rencontre aussi dans l Ouest (61, 72). Il renvoie sans doute au mot hagron , qui a désigné le héron. Soit le fils de celui qui s appelle Agron ou Hagron, soit celui qui est originaire d un… … Noms de famille
René Dagron — René Prudent Patrice Dagron (17 March, 1819 ndash;13 June 1900) was a French photographer and inventor. He was born in Beauvoir, Sarthe, France. [http://www.srlf.ucla.edu/exhibit/text/Chronology.htm CHRONOLOGY OF MICROFILM DEVELOPMENTS 1800… … Wikipedia
Rene Dagron — René Dagron Prudent René Patrice Dagron Prudent René Patrice Dagron, né à Beauvoir, dans la Sarthe, le 17 mars 1819, mort le 13 juin 1900, est un photographe, inventeur de la microphotographie ou microfilm. En 1860, René Dagron va regrouper une… … Wikipédia en Français
René Dagron — Prudent René Patrice Dagron Prudent René Patrice Dagron, né à Beauvoir, dans la Sarthe, le 17 mars 1819, mort le 13 juin 1900, est un photographe et un inventeur français. Le 21 juin 1859, il sera le premier à breveter un procédé de microfilm[1] … Wikipédia en Français
Tristan Dagron — Tristan Dagron, né en 1964 à Paris, ancien élève de l École normale supérieure (Ulm, 1985), agrégé et docteur en philosophie, est directeur de recherches au CNRS (UMR 5037 : Institut d histoire de la pensée classique, de l Humanisme aux… … Wikipédia en Français
Alfonso Gumucio Dagron — Infobox Writer name = Alfonso Gumucio Dagron caption = Alfonso Gumucio in London, in March 2006 birthdate = Birth date and age|1950|10|31|mf=y birthplace = La Paz, Bolivia occupation = poet, short story writer, photographer, journalist, filmmaker … Wikipedia
René Dagron — René Prudent Patrice Dagron (* 13. März 1813 in Beauvoir; † 13. Juni 1900 in Paris) war ein französischer Chemiker, Fotograf und Erfinder des Mikrofilms. René Dagron zog bereits früh nach Paris und studierte dort Physik un … Deutsch Wikipedia
Gumucio Dagrón, Alfonso — (1950– ) Bolivian writer, filmmaker, photographer, journalist, and specialist in developmental communications. Born into a family with deep roots in the cultural and political life of Bolivia, Gumucio Dagrón is the son of Alfonso Gumucio Reyes … Historical Dictionary of the “Dirty Wars”
Gilbert Dagron — (né en 1932) est un historien français, spécialiste de l histoire byzantine. Il a été professeur au Collège de France de 1975 à 2001. Principaux ouvrages Naissance d une capitale. Constantinople et ses institutions de 330 à 451, Paris,… … Wikipédia en Français
ДАГРОН — [франц. Dagron] Жильбер (род. 26.01.1932, Париж), франц. византинист. В 1953 1956 гг. обучался в Высшей педагогической школе (École Normale Supérieure) по специальности «классическая литература». В 1956 1957 гг. преподавал в лицее в Лане. С 1960… … Православная энциклопедия