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- Motor Controllers for the Telescope at the Yerkes Observatory, Williams Bay, Wisconsin, 1932 - Yerkes Observatory in Williams Bay, Wisconsin is known as the birthplace of modern physics for the volume and importance of research conducted there. It is also home to the world's largest refracting telescope. When it opened in 1897, the observatory included an adjustable floor and a rotating dome, governed by motor controllers made by Chicago-based Cutler-Hammer Manufacturing Company.

- October 14, 1932
- Collections - Artifact
Motor Controllers for the Telescope at the Yerkes Observatory, Williams Bay, Wisconsin, 1932
Yerkes Observatory in Williams Bay, Wisconsin is known as the birthplace of modern physics for the volume and importance of research conducted there. It is also home to the world's largest refracting telescope. When it opened in 1897, the observatory included an adjustable floor and a rotating dome, governed by motor controllers made by Chicago-based Cutler-Hammer Manufacturing Company.