page_title: John Herschel
hierarchical_section_title: John Herschel
caption_attribution_description: "Sir John Herschel". Subject is John Herschel, English mathematician and scientist. Albumen print, 384 x 279mm (15 1/8 x 11 1/8"). National Portrait Gallery: NPG P201 While Commons policy accepts the use of this media, one or more third parties have made copyright claims against Wikimedia Commons in relation to the work from which this is sourced or a purely mechanical reproduction thereof. This may be due to recognition of the "sweat of the brow" doctrine, allowing works to be eligible for protection through skill and labour, and not purely by originality as is the case in the United States (where this website is hosted). These claims may or may not be valid in all jurisdictions. As such, use of this image in the jurisdiction of the claimant or other countries may be regarded as copyright infringement. Please see Commons:When to use the PD-Art tag for more information. See User:Dcoetzee/NPG legal threat for original threat and National Portrait Gallery and Wikimedia Foundation copyright dispute for more information. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing for more information.
context_page_description: Sir John Frederick William Herschel, 1st Baronet was an English mathematician, astronomer, chemist, and experimental photographer/inventor. He was the son of astronomer Sir William Herschel and the father of 12 children.
context_section_description: Sir John Frederick William Herschel, 1st Baronet (7 March 1792 – 11 May 1871) was an English mathematician, astronomer, chemist, and experimental photographer/inventor. He was the son of astronomer Sir William Herschel and the father of 12 children.
caption: Sir John Herschel, 1867 photograph by Julia Margaret Cameron.
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