Professor William H. Barton at the control panel, Hayden Planetarium, November 1937 

Professor William H. Barton at the Control Panel in the Hayden Planetarium, November 1937 

Mr. Fred Raiser, technician, and Professor William H. Barton with Cosmic Ray Counter machine, Hayden Planetarium, 1939 

Professor William H. Barton at the control panel in the Hayden Planetarium 

Sir James Jeans and Clyde Fisher with the Hayden Planetarium projection equipment, 1937 

United States Naval Academy Midshipmen from Annapolis outside the Hayden Planetarium, June 1936 

Lecture in dome, Hayden Planetarium, 1941 

Hayden Planetarium, exterior, 1936 

S.I. Gale, guest lecturer, explaining the Control Booth, Hayden Planetarium, 1957 

John Saunders instructing children, Hayden Planetarium, 1943 

Aztec calendar stone in floor of Solar Room, Hayden Planetarium, 1934 

Visitor at Cosmic Ray Counter machine, Hayden Planetarium, 1939 

Children viewing the Zeiss Projector, Hayden Planetarium 

The Zeiss Projector in the Hayden Planetarium, showing coordinates along part of the ecliptic and altitudes on meridian, 1939 

Planetarium chamber showing skyline and seating, Hayden Planetarium, November, 1936 

Assistant Curator Marian Lockwood with group of children in the Copernican Planetarium, Hayden Planetarium, 1940 

The Planetarium during a performance, 1942 

President F. Trubee Davison, Prince Chichibu, brother of the Emperor of Japan, Clyde Fisher, Head of the Hayden Planetarium and Roy Chapman Andrews, Director of the Hayden Planetarium, Hayden Planetar 

The Hayden Planetarium at night, 1936 

Electron telescope and projector used in Mysterious Mars show, Hayden Planetarium, 1941