{c}

https://www.scientificindustries.com/vortex-genie-2.html (https://web.archive.org/web/20190908034549/https://www.scientificind.ustries.com/vortex-genie-2.html[archive])

https://en.wikipedia.org/wiki/Vortex_mixer

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Scientific Industries Inc. Vortex-Genie 2