Johan Gottlieb Gahn:
Johan Gottlieb Gahn was a Swedish chemist.
August 19, 1745 in Voxna, Sweden
December 8, 1818 in Stockholm, Sweden
Claim to Fame:
Gahn was a Swedish chemist and mineralogist who first isolated the element manganese. He was active in the copper smelting industry and made several improvements in the smelting process. He also discovered phosphoric acid in bones with Carl Scheele and separated phosphorus from bones.