John Browne

John Browne or Brown was an English chemist, elected Fellow of the Royal Society in 1721. His father John Browne of London was an apothecary, and Browne joined the Society of Apothecaries in 1697. d. 1736). He discovered the presence of magnesia in sea-water, and researched the manufacture of Prussian blue, publishing on these topics in the Philosophical Transactions.