Yerkes Observatory Collection

William W. Morgan taking the 10,000th spectroheliogram at Yerkes Observatory
The 40-inch Yerkes Observatory refracting telescope
William W. Morgan at the Bruce Telescope, Yerkes Observatory
Yerkes Observatory 24-inch reflector telescope
Portrait of Otto Struve serving as a Russian Army lieutenant during World War I
The Yerkes Observatory 40-inch refractor as exhibited at the 1893 Columbian Exposition
Three unidentified men inside of the Alvan Clark and Sons Telescope Factory
Friess Spectrometer at Yerkes Observatory, circa 1898
Williams Bay Domestic Science class at the Yerkes Observatory
The Snow Horizontal telescope with a good view of the heliostat
Yerkes Observatory staff in August 1919
Interior of the Yerkes Observatory heliostat room with its radiometer experiment
Members of the National Academy of Sciences visit Yerkes Observatory, November 18, 1903
The polar axis of the Yerkes Observatory 40-inch refractor being lowered into position
Association of Midwest Astronomers with Yerkes Observatory Staff, May 22, 1925
Four unidentified men surround the tube of a photoheliograph and photographic house
American Association of Variable Star Observers at Yerkes Observatory, September 5, 1925
The old Kenwood Observatory in Chicago belonged to the family of George Ellery Hale
Speakers at the International Astrophysical Conference on Novae and White Dwarf Stars in Paris, France, 1939
On the Yerkes Observatory expedition to Santa Catalina Island, California (Camp Wrigley) to record the total solar eclipse of September 10, 1923

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