PENLEE HOUSE GALLERY AND MUSEUM. It is strange that Humphry Davy of Penzance is best known today for an invention made to help coal miners in the Midlands. Davy was a chemist and became president ...

Magnesium was first isolated in pure form in 1808 by Sir Humphry Davy, who used an electrolytic ... and Magnus Martin Pontin to isolate sodium, barium, potassium, strontium and calcium, between ...