SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
The German alchemist Dr. Hennig Brand discovered phosphorus in Hamburg in 1669. He was using the residue from evaporated urine to search for the philosopher's stone, a mythical mineral which was said to be able to turn base metal into gold. Instead he discovered phosphorous. After the painting by Joseph Wright of Derby, 1771.
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