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Kovac prototype
Built by Frank Kovac at Rhinelander, Wisconsin, USA
His work is based on the principle of the Atwood sphere (1913) exhibited in Adler, Chicago.
- 1996: Kovac Planetarium (Rhinelander, WI, USA)
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Built by Frank Kovac at Rhinelander, Wisconsin, USA
His work is based on the principle of the Atwood sphere (1913) exhibited in Adler, Chicago.
- 1996: Kovac Planetarium (Rhinelander, WI, USA)