[ExI] the vortices of Jupiter

[Amara Graps]

The Yerkes Observatory (refractor) probably had some the best optics for
seeing planets in the early 1900s.

http://astro.uchicago.edu/yerkes/

To check for other telescopes operating at that time observing the planets,
it's better to consider the refractors than the reflectors.

Amara
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Amara Graps, PhD      www.amara.com
Research Scientist, Southwest Research Institute (SwRI), Boulder, Colorado