SIR HUMPHRY DAVY - AUTOGRAPH SENTIMENT SIGNED - HFSID 17852
Sale Price $270.00
Discoverer of sodium, potassium and calcium.
Signature: "I am Sir/your obt humble Sert/H. Davy", 1p, 3¼x1½, mounted on 6x4 white card. English chemist Sir Humphry Davy pioneered the study of electrochemistry. In 1799, he discovered the exhilarating effect of nitrous oxide (laughing gas) when inhaled. Electrolytic methods yielded him the elements sodium, potassium and calcium (1807-1808). He also recognized the element nature of chlorine and gave it its name (1810). He invented the miner's safety lamp, called the Davy Lamp in 1815. Lightly soiled. Overall, fine condition.
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