Performing the analysis, 1856
Dr. Alfred Swaine Taylor (left) and a colleague, performing the Marsh test on samples taken from the body of John Parsons Cook. The two were looking for traces of arsenic and antimony.
Illustrated and unabridged edition of the Times report of the trial of William Palmer, for poisoning John Parsons Cook, at Rugeley, London, Wood engraving
National Library of Medicine