Sir John Herschel

Self-respect is the cornerstone of all virtue Sir John Frederick William Herschel, 1st Baronet KH FRS was an English polymath, mathematician, astronomer, chemist, inventor, experimental photographer who invented the blueprint, and did botanical work. Herschel originated the use of the Julian day system in astronomy. Wikipedia Born: 7 March 1792, Slough Died: 11 May 1871, […]

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