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

Hayden Planetarium, exterior, 1936 

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 

Children viewing the Zeiss Projector, Hayden Planetarium 

Prize winning poster, Hayden Planetarium, 1939 

Prize winning poster, Hayden Planetarium, 1939 

Children sitting in pits of the Willamette Meteorite, Hayden Planetarium, 1939 

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

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

Visitors looking at transparency, Hayden Planetarium, August 1936 

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 

Ahnighito section of the Cape York meteorite in the first floor corridor, Hayden Planetarium, June, 1936 

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

Ahnighito section of the the Cape York meteorite in the first floor corridor, Hayden Planetarium, June, 1936 

Willamette meteorite in the first floor corridor, Hayden Planetarium, 1936 

Willamette meteorite in the first floor corridor, Hayden Planetarium, 1936 

Children sitting in the pits of the Willamette Meteorite, Hayden Planetarium 

Longitudinal Section of the Hayden Planetarium, drawing by T.W. Voter, 1936 

Replica of telescope made by Galileo, Hayden Planetarium, August 1936