who discovered boron

Boron was discovered in 1808 independently by French chemists Joseph-Louis Gay-Lussac and Louis-Jacques Thénard, and by English chemist Sir Humphry Davy. Gay-Lussac and Thénard isolated boron by reacting boric acid with magnesium or sodium, while Davy produced boron by reducing boric acid with potassium in a hydrogen atmosphere. Neither had obtained pure boron initially; their samples were about 60% pure. Pure boron was later produced by American chemist Ezekiel Weintraub in 1909.