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Mary Marsh. 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] He was married to Mary, and had four children, two of whom died in infancy. [2]
Specifically, Orfila applied the Marsh test to decide the controversial trial of Marie Lafarge, who was charged with murder in the arsenic poisoning of her husband. Based on his results, Lafarge was found guilty and sentenced to death (which was later reduced to life in prison).
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Jan 9, 2017 · James Marsh. During the 19th century, arsenic trioxide was a very cheap, easy to find, highly poisonous white powder. People used it mostly to get rid of rats and mice, so it wasn’t an awkward thing to ask the local chemist or even a grocer for some arsenic.
- Marie Lafarge – Background
- The Crime
- Toxicological Examination
- Gaining Popular Interest
- Guilty Or Innocent?
Marie Lafarge grew up with her maternal aunt and was sent to only the best schools throughout her youth. Wealth has always been an important issue of her life. Coming from a rather poor family, she mainly spent time with rich peers. Her friends soon started to marry wealthy noblemen while Marie Lafarge found no partner for life in the ‘right’ circl...
On August 13, they arrived at their new home and Marie noticed the fraud. The situation made her mad, the house was full of rats, her family-in-law did not trust her and her husband was in deep dept. During the winter time, Charles Lafarge became suddenly ill and nobody was suspicious that his wife asked the doctor for an arsenic prescription, sinc...
The police was informed and a post-mortem examination was to be performed. The Marsh test was back then a new method in order to detect arsenic in a dead person’s body. However, the test was not used in this case. The investigators only observed the insides of Lafarge’s stomach and indeed tested it positive on the poison. The Marsh test was actuall...
Her case gained lots of social interest and numerous people came from all over the continent to watch the trial. Her defense lawyer knew about the Marsh test and insisted it to be performed since it was the most reliable method. When the investigators got back the results showed no evidence of arsenic. When further testing was performed, again no p...
By then, the affair had polarized French society. The case turned out to be highly controversial and divided the country into two parties, believing Marie Lafarge to be guilty or innocent. The press however demanded to broaden the field of forensic toxicology with success. The knowledge grew and a new field of research evolved to help investigation...
Jun 13, 2009 · In 1836 English chemist James Marsh combined the previous work of Carl Wilhelm Scheele and Johann Daniel Metzger to form his revolutionary arsenic-detection process. Mateu Orfila famously employed the Marsh test in the highly publicized 1840 trial of Madame Lafarge, but there were many others who worked to find the perfect test for arsenic ...
May 26, 2017 · The 1833 murder trial of John Bodle presented a typical narrative of family tiffs gone south: Bodle was arrested on suspicion of slipping poison into his grandfather’s coffee, and chemist James...
James Marsh (Chemist), a British chemist who created the Marsh test for detecting arsenic, lived from September 2, 1794, to June 21, 1846. Before joining the Royal Artillery, he worked as a laborer in Woolwich during the late 1810s and early 1820s. He married Mary and they had four children, two of them died as infants.
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