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| awards = [[Fellow of the Royal Society]]<ref name="frs">{{Cite journal | last1 = Peacock | first1 = A. D. | doi = 10.1098/rsbm.1968.0011 | title = John William Heslop Harrison 1881-1967 | journal = [[Biographical Memoirs of Fellows of the Royal Society]] | volume = 14 | pages = 243–270| year = 1968 | doi-access = free }}</ref>
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<!--Though frequently hyphenated, Heslop Harrison is the correct spelling. Refer to the book by Sabbagh listed below for a discussion of this point.-->
==Early life and education==
He was born in [[Birtley, Tyne and Wear|Birtley]] on 22 January 1881, the son of George Heslop-Harrison, a pattern-maker at Birtley Iron Works. He was educated at [[Bede College]] School in [[Durham, England|Durham]] then Rutherford School for Boys in [[Newcastle
He then studied at [[Durham College of Science]],
In 1921 he was elected a [[Fellow of the
He died in [[Birtley, Tyne and Wear]] on 23 January 1967.
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In 1917 he began lecturing in Genetics and Botany at the [[Newcastle University|University of Newcastle]] being given a professorship in 1927. He remained in this role until retiring in 1946.
===
In 1948 he was
===Lamarckian experiments===
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Heslop Harrison was described as a loner who avoided as much contact as possible with other professionals and conducted most of his experiments at his home in [[Birtley, Tyne and Wear]].<ref name="Salmon 2000"/> He was a supporter of [[Lamarckism|Lamarckian]] evolution from his experiments with [[moth]]s and [[sawfly|sawflies]].<ref>[[Peter J. Bowler|Bowler, Peter J]]. (1983). ''The Eclipse of Darwinism: Anti-Darwinian Evolutionary Theories in the Decades Around 1900''. p. 103. Johns Hopkins University Press. {{ISBN|978-0801843914}}.</ref> According to researcher Michael A. Salmon "Heslop Harrison claimed to have experimental proof that physical changes in the life of an individual moth or sawfly could be passed on to its progeny, according to the theory of Lamarck... For example, Heslop Harrison thought that melanism resulted from the effect of pollution on individual moths which somehow altered their genes. When others attempted to repeat his experiment, however, they always seemed to come up with different results."<ref name="Salmon 2000"/>
In the 1920s, Heslop Harrison conducted experiments on the [[peppered moth]], claiming to have evidence for the [[inheritance of acquired characteristics]]. Other scientists failed to replicate his results.<ref>Giltrow, Janet. (2002). ''Academic Reading, Second Edition: Reading and Writing Across the Disciplines''. Broadview Press. p. 144. {{ISBN|1-55111-393-7}} "During the 1920s, the entomologist J. W. Heslop-Harrison published experimental data supporting his claim that chemicals in soot caused widespread mutations from light winged to the dark winged form. Because these mutations were supposedly passed on to subsequent generations, Harrison claimed that he had documented a case of inheritance of acquired traits. Other biologists failed to replicate Harrison's results, and R. A. Fisher pointed out that Harrison's hypothesis required a mutation rate far higher than any previously reported."</ref><ref>Moore, Randy; Decker, Mark D. (2008). ''More Than Darwin: An Encyclopedia of the People and Places of the Evolution-creationism Controversy''. Greenword Press. p. 203 {{ISBN|978-0313341557}} "In the 1920s, British entomologist J.W Heslop Harrison (1881–1967) claimed that pigmentation of these moths was a result of Lamarckism. However, scientists could not repeat Harrison's work, and evolutionary biologists such as Ronald Fisher argued that Harrison's explanation required much higher rates of mutation than had been reported."</ref> His experiments were criticised by [[J. B. S. Haldane]].<ref>{{cite journal | last1 = Haldane | first1 = J. B. S. | year = 1932 | title = The Hereditary Transmission of Acquired Characters
==Family==
In 1906 he married Christian Watson Henderson. Their eldest son was [[George Heslop-Harrison]] [[FRSE]] who also came to fame as an entomologist.
Heslop Harrison's fourth son was [[Jack Heslop-Harrison]] who became director of the [[Royal Botanic Gardens, Kew]] in 1970. His daughter Helena married the botanist [[William Andrew Clark]].<ref>[https://www.royalsoced.org.uk/cms/files/fellows/biographical_index/fells_indexp1.pdf "Former Fellows of The Royal Society of Edinburgh 1783–2002"] {{Webarchive|url=https://web.archive.org/web/20130124115814/http://www.royalsoced.org.uk/cms/files/fellows/biographical_index/fells_indexp1.pdf |date=24 January 2013 }}.</ref>
==Botanical Reference==
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==References==
{{reflist
{{Authority control}}
{{DEFAULTSORT:Heslop Harrison, John William}}
[[Category:1881 births]]▼
[[Category:1967 deaths]]▼
[[Category:Academics of Durham University]]
[[Category:British botanists]]
[[Category:Fellows of the Royal Society]]
[[Category:Hoaxes in science]]
[[Category:
▲[[Category:1881 births]]
▲[[Category:1967 deaths]]
[[Category:People from Birtley, Tyne and Wear]]
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