John Browne (chemist) explained

John Browne or Brown (died 1735) was an English chemist, elected Fellow of the Royal Society in 1721.^[1]

His father John Browne of London was an apothecary, and Browne joined the Society of Apothecaries in 1697. He discovered the presence of magnesia in sea-water, and researched the manufacture of Prussian blue (invented by Johann Jacob Diesbach, in 1706^[2]), publishing on these topics in the Philosophical Transactions.^{[1] [3]}

Notes and References

1. 3620. Browne, John. Anita. McConnell.
2. Kraft. Alexander. On the Discovery and History of Prussian Blue. Bull. Hist. Chem.. 33. 2. 61–67. 2008.
3. Book: British Association for the Advancement of Science. A history of the trade and manufactures of the Tyne, Wear, and Tees: comprising the papers prepared under the auspices of a committee of local industry and read at the sectional meetings of the British Association, 1863. 7 July 2013. 1863. Lambert. 150.