Adler Planetarium

Partner Address: 

1300 S Lake Shore Dr.

City, State, Zip: 

Chicago, IL 60605

Partner Phone: 

(312) 922-7827

Partner Contact: 

Jennifer Howell, Public Relations Manager

Photoelectric Relay

Image of Photoelectric Relay.

Photoelectric relay made at Yerkes Observatory, Williams Bay, Wisconsin, with the cooperation of the General Electric Co., and photoelectric cells by R. J. Cashman and W. S. Huxford, 1933.  Courtesy of the Adler Planetarium.

The Chicago Century of Progress Exposition of 1933-34 celebrated the alliance between science and industry, conveying a message of hope for a better future in times of depression. The most dramatic and anticipated moment of the opening ceremony in the evening of May 27, 1933, was when the illumination of the fair was turned on, unfolding as a spectacle of light and color.
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