Clemens Alexander Winkler (December 26, 1838 - October 8, 1904), a German chemist, discovered the element Germanium in 1886. This discovery solidified Dmitri Mendeleev's theory of periodicity. Mendeleev's thoughts on the element came really close to what the actual element was like. Winkler was born in 1838 in Freiberg, Saxony, Germany. His father was a chemist too. When he entered the Freiberg University of Mining and Technology at age 19, … Wikipedia
The definitive Wikipedia entry for Clemens Winkler. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Clemens_Winkler