John Browne orBrown (died 1735) was an English chemist, electedFellow of the Royal Society in 1721.[1]
His father John Browne of London was anapothecary, and Browne joined theSociety of Apothecaries in 1697. He discovered the presence ofmagnesia in sea-water, and researched the manufacture ofPrussian blue (invented byJohann Jacob Diesbach, in 1706[2]), publishing on these topics in thePhilosophical Transactions.[1][3]