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Arrival of E.C. Slipher in Flagstaff from South America, 1907
E.C. Slipher's office
Construction of E.C Slipher home along old road
E.C. Slipher by front door of Administration Building, 1932
E.C. Slipher with Allan Cree, Ken Newman, Henry Giclas, Clyde Tombaugh, Carl Otto Lampland, Beth Fisher, Vesto M. Slipher, and Clyde Fisher, 1932
E.C. Slipher's portrait
E.C. Slipher at the Lamont-Hussey Observatory in South Africa
E.C Slipher's portrait, 1940
E.C. Slipher in Reading Room of Administration Building, 1947
E.C. Slipher studies an image of Saturn, 1947
E.C. Slipher points out features on a Mars map to astronauts, 1963
Planetary Research Center Groundbreaking, 1964