About Eugen Goldstein
Eugen Goldstein was a German physicist. He was an early investigator of discharge tubes, and the discoverer of anode rays or canal rays, later identified as positive ions in the gas phase including the hydrogen ion. He discovered several important properties of cathode rays, which contributed to their later identification as the first subatomic particle, the electron. He was awarded the Hughes Medal in 1908 for this work. In 1886, he discovered that tubes with a perforated cathode also emit a glow at the cathode end. Goldstein worked at the Berlin Observatory from 1878 to 1890, but spent most of his career at the Potsdam Observatory, where he became head of the astrophysical section in 1927.
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