https://astroblob.com/en/telescope/page/telescopio-refractor-yerkes
The Yerkes Observatory refractor telescope, inaugurated in 1897, is the largest optical refractor in the world, featuring a 40-inch (101 cm) lens. Its design...
refractoryerkes
https://www.yerkeswatercolors.com/large-multi-view/Travel/3212755-20-206938/Painting/tiki-too.html
watercolor,waterside scape. Original Painting
too originalby williamtikiartyerkes
https://www.starsatyerkes.net/stars-at-yerkes-home
Stars at Yerkes Observatory Created by the Astronomy Resources Connecting Schools (ARCS)
yerkes observatorystars
https://maryyerkes.com/contact/
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