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William de Wiveleslie AbneyWilliam de Wiveleslie Abney FRS (July 24, 1843 - December 3, 1920) was an English astronomer, chemist, and photographer. Additional recommended knowledge
BiographyAbney was born in Derby, England, to a clergyman father. He attended Rossall School, the Royal Military Academy, Woolwich and joined the Royal Engineers in 1861, with whom he served in India for several years. Thereafter, and to further his knowledge in photography, he became a chemical assistant at the Chatham School of Military Engineering. Abney was a pioneer of several technical aspects of photography. His endeavors in the chemistry of photography produced useful photographic products and also developments in astronomy. He wrote many books on photography that were considered standard texts at the time, although he was doubtful that his improvements would have a great impact on the subject. Abney investigated the blackening of a negative to incidental light. In 1874, Abney developed a dry photographic emulsion, which replaced "wet" emulsions. He used this emulsion in an Egyptian expedition to photograph the transit of Venus across the sun. In 1880, he introduced hydroquinone. Abney also introduced new and useful types of photographic paper, including in 1882 a formula for gelatin silver chloride paper. Abney conducted early research into the field of spectroscopy, developing a red-sensitive emulsion which was used for the infrared spectra of organic molecules. He was also a pioneer in photographing the infrared solar spectrum (1887), as well as researching sunlight in the medium of the atmosphere. Abney invented the "Abney Level", a combined clinometer and spirit level, used by surveyors to measure slopes and angles. He died in Folkestone, England. Publications
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "William_de_Wiveleslie_Abney". A list of authors is available in Wikipedia. |