1843 – Born on the 24th of July in Derby, England.
1861 – He attended the Royal Military Academy and joined the Royal Engineers.
– He was a pioneer of several technical aspects of photography.
– He became a chemical assistant at the Chatham School of Military Engineering.
1874 – He 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.
1880 – He introduced hydroquinone.
1882 – He introduced new and useful types of photographic paper, including a formula for
gelatin silver chloride paper.
1887 – He was also a pioneer in photographing the infrared solar spectrum, as well as researching
sunlight in the medium of the atmosphere.
– He invented the "Abney Level", a combined clinometer and Spirit level , used by surveyors
to measure slopes and angles.
1920 – He died on the 3rd of December in Folkestone, England.