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James Marsh (born 30 April 1963) is a British film and documentary director best known for his work on Man on Wire, which won the 2008 Academy Award for Best Documentary Feature, and The Theory of Everything, the multi-award-winning biopic of physicist Stephen Hawking released in 2014.
James Marsh. Director: The Theory of Everything. James Marsh was born on 30 April 1963 in Truro, Cornwall, England, UK. He is a director and producer, known for The Theory of Everything (2014), The King (2005) and Shadow Dancer (2012).
- January 1, 1
- 1.83 m
- Truro, Cornwall, England, UK
James Marsh (2 September 1794 – 21 June 1846) was a British chemist who invented the Marsh test for detecting arsenic. Born in Kent, he was working as a labourer in Woolwich in the late 1810s and early 1820s, before joining the Royal Artillery. [1]
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The first breakthrough in the detection of arsenic poisoning was in 1775 when Carl Wilhelm Scheele discovered a way to change arsenic trioxide to garlic-smelling arsine gas (AsH3), by treating it with nitric acid (HNO3) and combining it with zinc. 1. As2O3 + 6 Zn + 12 HNO3 → 2 AsH3 + 6 Zn(NO3)2 + 3 H2O In 1787, German physician Johann Metzger[de] (...
Though precursor tests existed, they had sometimes proven not to be sensitive enough. In 1832, a certain John Bodle was brought to trial for poisoning his grandfather by putting arsenic in his coffee. James Marsh, a chemist working at the Royal Arsenal in Woolwich, was called by the prosecution to try to detect its presence. He performed the standa...
The Marsh test treats the sample with sulfuric acid and arsenic-free zinc. Even if there are minute amounts of arsenic present, the zinc reduces the trivalent arsenic (As3+). Here are the two half-reactions: 1. Oxidation: Zn → Zn2+ + 2 e− 2. Reduction: As2O3 + 12 e− + 6 H+ → 2 As3− + 3 H2O Overall, we have this reaction: 1. As2O3 + 6 Zn + 6 H+ → 2 ...
Although the Marsh test was efficacious, its first publicly documented use—in fact, the first time evidence from forensic toxicology was ever introduced—was in Tulle, France in 1840 with the celebrated Lafarge poisoning case. Charles Lafarge, a foundry owner, was suspected of being poisoned with arsenic by his wife Marie. The circumstantial evidenc...
The Lafarge case proved to be controversial, for it divided the country into factions who were convinced or otherwise of Mme. Lafarge's guilt; nevertheless, the impact of the Marsh test was great. The French press covered the trial and gave the test the publicity it needed to give the field of forensic toxicology the legitimacy it deserved, althoug...
Marsh test is used in Bill Bergson Lives Dangerouslyto prove that a certain chocolate is poisoned with arsenic. Lord Peter Wimsey’s manservant Bunter uses Marsh’s test in Strong Poisonto demonstrate that the culprit was secretly in possession of arsenic. In Alan Bradley's As Chimney Sweepers Come To Dust, 12-year old sleuth and chemistry genius Fla...
Marsh, James (1837). "Arsenic; nouveau procédé pour le découvrir dans les substances auxquelles il est mêlé". Journal de Pharmacie. 23: 553–562.Marsh, James (1837). "Beschreibung eines neuen Verfahrens, um kleine Quantitäten Arsenik von den Substanzen abzuscheiden, womit er gemischt ist". Liebigs Annalen der Chemie. 23 (2): 207–216. doi:10...Mohr, C. F. (1837). "Zusätze zu der von Marsh angegebenen Methode, den Arsenik unmittelbar im regulinischen Zustande aus jeder Flüssigkeit auszuscheiden" [Addenda to the method given by Marsh for s...Lockemann, Georg (1905). "Über den Arsennachweis mit dem Marshschen Apparate" [On the detection of arsenic with the Marsh apparatus]. Angewandte Chemie. 18 (11): 416–429. Bibcode:1905AngCh..18..416...McMuigan, Hugh (1921). An Introduction to Chemical Pharmacology. Philadelphia: P. Blakiston's Son & Co. pp. 396–397. Retrieved 2007-12-16.Wanklyn, James Alfred (1901). Arsenic. London: Kegan Paul, Trench, Trübner & Co. Ltd. pp. 39–57. Retrieved 2007-12-16. James Marsh Test.Nov 26, 2014 · A biographical drama about Stephen Hawking and his wife Jane, directed by James Marsh. The film won an Oscar for Eddie Redmayne's portrayal of the physicist and received positive reviews from critics and audiences.
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- Biography, Drama, Romance
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- 2014-11-26
James Marsh (1794-1846) was a chemist who developed a simple and reliable method to detect arsenic in food, fluids, or tissues. His test, known as the Marsh test or the Marsh Arsenic test, was used in forensic investigations and trials for over a century.
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James Marsh is a British filmmaker who has won multiple awards for his documentaries and features, such as Man on Wire and The Theory of Everything. Learn more about his bio, latest film, and commercial work on Thirsty Film.
