| In 1885 a new ore - argyrodite - was discovered in the local mines. Winkler, who had a considerable reputation as an analyst,
was asked to examine it and to his surprise the results of his analysis consistently came out too low. He discovered that
this was due to the presence of a new element, which, after several months' search, he isolated and named germanium after his fatherland. The properties of germanium matched those of the eka-silicon whose existence had been predicted in 1871 by Dmitri Mendeleev. Winkler's discovery completed the detection of the three new elements predicted by Mendeleev nearly 20 years before.
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