|Born||March 26, 1872|
|Institutions||University of Minnesota
|Alma mater||University of Minnesota (B.S. 1892, Ph.D. 1906)
University of Cambridge (B.A. 1899)
|Doctoral advisor||Henry T. Eddy|
|Other academic advisors||J. J. Thomson|
|Known for||Zeleny electroscope
John Zeleny (1872–1951) was a Czech-American physicist at the University of Minnesota, who in 1911 invented the Zeleny electroscope. He also studied the effect of an electric field on a liquid meniscus. His work is seen by some as a beginning to emergent technologies like liquid metal ion sources and electrospraying and electrospinning.
- Zeleny, John (1914). "The electrical discharge from liquid points, and a hydrostatic method of measuring the electric intensity at their surfaces". Physical Review 3 (2): 69–91. Bibcode:1914PhRv....3...69Z. doi:10.1103/PhysRev.3.69.
- Zeleny, John (1917). "Instability of electrified liquid surfaces". Physical Review 10 (1): 1–6. Bibcode:1917PhRv...10....1Z. doi:10.1103/PhysRev.10.1.
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