Secondary Modern School and Rykneld recreation ground. Abney invented the "Abney level", a combined clinometer and spirit level, used by surveyors to measure slopes and angles. He was responsible for the "Abney mounting" of a concave grating spectrograph in which the photographic plate was fixed and the entry slit moved to accommodate different regions of the spectrum. He died on 3 December 1920 in Folkestone, England. He is buried in the churchyard of Holy Trinity Church in Folkestone. Family He had married twice: firstly in 1864 to Agnes Matilda Smith (died 1888) with whom he had a son and two daughters, and secondly in 1890 to Mary Louisa Mead with whom he had a further daughter. Publications Chemistry for Engineers, 1870. Thebes and its five greater temples, London, published by Sampson Low, Marston, Searle & Rivington, 1876. W. de W. Abney, Instruction in Photography, London, published by S. Low, Marston & company, 1900. A New Developer, Photographic News, 1880, 24:345. W. de W. Abney and E. R. Festing, Intensity of Radiation through Turbid Media, Proceedings of the Royal Society of London, Volume 40, pages 378–380, 1886. Published by The Royal Society. W. de W. Abney and E. R. Festing, Colour Photometry. Part III.Proceedings of the Royal Society of London, Volume 50, pages 369–372, 1891–1892. Published by The Royal Society. Organizations and honours 1876 Fellow of the Royal Society 1878 Received first Progress Medal of the Photographic Society of Great Britain ever 1885 Fellow of the Royal Society of Edinburgh 1892 to 1894, 1896 and 1903 to 1905 President of the Photographic Society of Great Britain aka Royal Photographic Society 1893 to 1895 President of the Royal Astronomical Society 1895 to 1897 President of the Physical Society of London CB : Companion of the Order of the Bath KCB: Knight Commander (civil division) of the Order of the Bath (KCB) - announced in the 1900 New Year Honours honours list on 1 January 1900, gazetted on 16 January 1900, and invested by Queen Victoria at Windsor Castle on 1 March 1900. Doctor of Science (D.Sc. Honoris causa) from the University of Dublin - June 1902. 1909 to 1920 Vice-President of Girls' Public Day School Trust See also Abney effect References Further reading "Abney, William de Wiveleslie." Britannica Student Encyclopedia. 2004. Encyclopædia Britannica. Klaus Hentschel: Mapping the Spectrum. Techniques of Visual Representation in Research and Teaching, Oxford: OUP 2002.online preview; search for