Have a drink with: James Marsh
Maybe pass on the coffee, though…

Ask him about: Arsenic and old cases

The Marsh Test & arsenic poisoning

In case you missed, it, I recently wrote at Atlas Obscura about 19th century efforts to take the threat and mystery out of arsenic poisoning, until then one of the most frequent and stealthy means of getting rid of that one person in your life who really can’t take a friggin’ hint. The development of the Marsh Test in the early 1800s meant that suddenly there was a precise, scientific means of figuring out whether someone had been knocked off with history’s own real-life version of iocane powder. Read on:

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