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Sir John Frederick William Herschel | International …
- https://iphf.org/inductees/sir-john-frederick-william-herschel/
- As quickly as February 1, William Henry Fox Talbot visited Herschel. Based on his research in 1819, Herschel solved the problem of fixing that plagued early photographic experimenters. That same year and the following years of 1840 and 1842, Herschel published papers on photography.
John Herschel - a Pioneer in Celestial Photography - SciHi …
- http://scihi.org/john-herschel-celestial-photography/
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John Herschel - Biography, Facts and Pictures - Famous …
- https://www.famousscientists.org/john-herschel/
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Sir John Herschel: Biography & Photography | Study.com
- https://study.com/academy/lesson/sir-john-herschel-biography-photography.html
- Explore the life and work of Sir John Herschel, a British scientist who contributed to the art of color photography. Learn about relations between …
Sir John Herschel | Photography: Then, Now, and Tomorrow
- http://milktruckmovies.com/precamera/sir-john-herschel/
- Sir John Herschel. Sir John Herschel was a scientist and astronomer like his father, Sir William Herschel. In 1809 he entered the University of Cambridge; in 1812 he submitted his first mathematical paper to the Royal Society, of which he was elected a fellow the following year. An accomplished chemist, Herschel discovered the action of hyposulfite of soda on otherwise …
To fix or not to fix? - Sir John Herschel's question
- https://talbot.bodleian.ox.ac.uk/2016/01/22/to-fix-or-not-to-fix-sir-john-herschels-question/
- By 1842 he had largely accepted Herschel’s hypo for fixing his prints. Each of these chemicals imparted a characteristic colour to the photographic print or negative: Sodium chloride yielded a lavender-hued negative or print; potassium iodide stained the paper yellow; and hypo produced a neutral darker brown.
From blue skies to blue print: Astronomer John …
- https://sites.utexas.edu/ransomcentermagazine/2010/12/07/from-blue-skies-to-blue-print-astronomer-john-herschels-invention-of-the-cyanotype/
- An accomplished chemist, Herschel discovered the action of hyposulfite of soda on silver salts, which lead to the use of “hypo” as the most effective fixing agent for silver-based photography. Herschel also endorsed and encouraged the term “photography” and coined the terms “negative” and “positive” to refer to photographic images. John Herschel not only …
John Herschel's invention - AlternativePhotography.com
- https://www.alternativephotography.com/cyanotype-history-john-herschels-invention/
- John Hershel’s cyanotype print ‘Lady with Harp’. The cyanotype process, also known as the blueprint process, was first introduced by John Herschel (1792 – 1871) in 1842. Sir John was an astronomer, trying to find a way of copying his notes. Herschel managed to fix pictures using hyposulphite of soda as early as 1839.
Timeline - John Herschel - Florida State University
- https://micro.magnet.fsu.edu/optics/timeline/people/jherschel.html
- Upon his return to England, Herschel began analyzing the data he had compiled in Africa, but also experimented in photography, a field he had made advances in previously. A skilled chemist, Herschel had discovered in 1819 the solvent power of sodium hyposulfite on otherwise insoluble silver salts, which was the prelude to it being utilized as a fixing agent in photography.
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