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John Herschel

Sir John Frederick William Herschel, 1st Baronet KH FRS (/ˈhɜːrʃəl, ˈhɛər-/;[2] 7 March 1792 – 11 May 1871)[1] was an English polymath active as a mathematician, astronomer, chemist, inventor and experimental photographer who invented the blueprint[3][4][5] and did botanical work.[6]

Sir
John Herschel
Bt KH FRS

John Frederick William Herschel

(1792-03-07)7 March 1792[1]
Slough, Buckinghamshire, England

11 May 1871(1871-05-11) (aged 79)[1]

Collingwood, near Hawkhurst, Kent, England

Westminster Abbey

Eton College

St John's College, Cambridge

Contributions to the invention of photography

Margaret Brodie Stewart

Herschel originated the use of the Julian day system in astronomy. He named seven moons of Saturn and four moons of Uranus – the seventh planet, discovered by his father Sir William Herschel. He made many contributions to the science of photography, and investigated colour blindness and the chemical power of ultraviolet rays. His Preliminary Discourse (1831), which advocated an inductive approach to scientific experiment and theory-building, was an important contribution to the philosophy of science.[7]

On Herschel's relationship with , William Whewell, and Richard Jones, see Snyder, Laura (2011), The Philosophical Breakfast Club: Four Remarkable Friends Who Transformed Science and Changed the World, New York: Broadway Books, ISBN 978-0-7679-3049-9

Charles Babbage

at the National Portrait Gallery, London

Portraits of John Herschel

. Eminent Persons: Biographies Reprinted from The Times. Vol. I (1870–1875). London: Macmillan & Co. 1892. pp. 33–36. hdl:2027/uc2.ark:/13960/t6n011x45. Retrieved 28 February 2019 – via HathiTrust.

"SIR JOHN HERSCHEL (Obituary Notice, Saturday, May 13, 1871)"

Archived 17 July 2013 at the Wayback Machine

Biographical information

R. Derek Wood (2008), 'Fourteenth March 1839, Herschel's Key to Photography'

Herschel Museum of Astronomy

Herschel's papers in the Royal Society's archives

Science in the Making

published in Astronomische Nachrichten

Wikisource copy of a notice from 1823 concerning the star catalogue