Davy; Sir Humphry; English chemist (discovered the elements sodium; potassium; calcium; strontium; barium u. magnesium).Penzance (Cornwall) 17.12.1778 - Geneva29.5.1829.Portrait.Copper engraving; 1634; by Victor Pollet(1811-1882).Paris; Biblioth鑡ue Nationale.
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