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1 special gelatine
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2 Lumière, Auguste
SUBJECT AREA: Photography, film and optics[br]b. 19 October 1862 Besançon, Franced. 10 April 1954 Lyon, France[br]French scientist and inventor.[br]Auguste and his brother Louis Lumière (b. 5 October 1864 Besançon, France; d. 6 June 1948 Bandol, France) developed the photographic plate-making business founded by their father, Charles Antoine Lumière, at Lyons, extending production to roll-film manufacture in 1887. In the summer of 1894 their father brought to the factory a piece of Edison kinetoscope film, and said that they should produce films for the French owners of the new moving-picture machine. To do this, of course, a camera was needed; Louis was chiefly responsible for the design, which used an intermittent claw for driving the film, inspired by a sewing-machine mechanism. The machine was patented on 13 February 1895, and it was shown on 22 March 1895 at the Société d'Encouragement pour l'In-dustrie Nationale in Paris, with a projected film showing workers leaving the Lyons factory. Further demonstrations followed at the Sorbonne, and in Lyons during the Congrès des Sociétés de Photographie in June 1895. The Lumières filmed the delegates returning from an excursion, and showed the film to the Congrès the next day. To bring the Cinématographe, as it was called, to the public, the basement of the Grand Café in the Boulevard des Capuchines in Paris was rented, and on Saturday 28 December 1895 the first regular presentations of projected pictures to a paying public took place. The half-hour shows were an immediate success, and in a few months Lumière Cinématographes were seen throughout the world.The other principal area of achievement by the Lumière brothers was colour photography. They took up Lippman's method of interference colour photography, developing special grainless emulsions, and early in 1893 demonstrated their results by lighting them with an arc lamp and projecting them on to a screen. In 1895 they patented a method of subtractive colour photography involving printing the colour separations on bichromated gelatine glue sheets, which were then dyed and assembled in register, on paper for prints or bound between glass for transparencies. Their most successful colour process was based upon the colour-mosaic principle. In 1904 they described a process in which microscopic grains of potato starch, dyed red, green and blue, were scattered on a freshly varnished glass plate. When dried the mosaic was coated with varnish and then with a panchromatic emulsion. The plate was exposed with the mosaic towards the lens, and after reversal processing a colour transparency was produced. The process was launched commercially in 1907 under the name Autochrome; it was the first fully practical single-plate colour process to reach the public, remaining on the market until the 1930s, when it was followed by a film version using the same principle.Auguste and Louis received the Progress Medal of the Royal Photographic Society in 1909 for their work in colour photography. Auguste was also much involved in biological science and, having founded the Clinique Auguste Lumière, spent many of his later years working in the physiological laboratory.[br]Further ReadingGuy Borgé, 1980, Prestige de la photographie, Nos. 8, 9 and 10, Paris. Brian Coe, 1978, Colour Photography: The First Hundred Years, London ——1981, The History of Movie Photography, London.Jacques Deslandes, 1966, Histoire comparée du cinéma, Vol. I, Paris. Gert Koshofer, 1981, Farbfotografie, Vol. I, Munich.BC -
3 Waterhouse, Major-General James
SUBJECT AREA: Photography, film and optics[br]b. 1841d. 28 September 1922[br]English military man and photographer.[br]Waterhouse spent most of his career in the Indian Army. In 1861–2 he was commissioned to photograph the tribes of central India, and over the next few years visited many parts of the subcontinent. In November 1866, after working for five months in the Great Trigonometrical Survey learning the process of photozincography (an early photomechanical process used chiefly for map making), he took charge of photographic operations at the Surveyor-General's office in Calcutta, a post he held until retiring in 1897. During this time he developed many improvements in the photomechanical methods used for reproduction in his office. He also experimented with methods of colour-sensitizing photographic materials, experimenting with eosine dye and publishing in 1875 the fact that this made silver halide salts sensitive to yellow light. He also discovered that gelatine dry plates could be made sensitive to red and infra-red illumination by treatment with alizarine blue solution.He continued his researches upon his retirement and return to England in 1897, and made a special study of the early history of the photographic process. His work on dye sensitizing brought him the Progress Medal of the Royal Photographic Society, and the Vienna Photographic Society awarded him the Voigtländer Medal for researches in scientific photography. One invention often erroneously attributed to him is the Waterhouse stop, the use of a series of perforated plates as a means of adjusting the aperture of a photographic lens. This was described in 1858 by a John Waterhouse, being his only contribution to photography.BCBiographical history of technology > Waterhouse, Major-General James
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