1796 - Juan José D'Elhuyar died.

Juan José D'Elhuyar was a Spanish mineralogist who, together with his brother Faustus D'Elhuyar, isolated the element tungsten from wolfram ore. Carl Scheele had discovered tungsten two years earlier in the form of tungstic acid, but did not separate the tungsten metal from the acid. The D'Elhuyar brothers reduced the acid through charcoal and removed the metal.