[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Trylon and Perisphere, New York World's Fair site.]

[Construction of the Perisphere with shadow of Trylon visible, New York World's Fair site.]

[Construction of the Trylon and Perisphere, New York World's Fair site.]

[Construction of the New York World's Fair site, with the steel frame of the Perisphere in the foreground.]

[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Perisphere, New York World's Fair site.]

[Construction of the Helicline, Trylon and Perisphere, New York World's Fair site.]

[Close-up of the Perisphere under construction, New York World's Fair site.]

[Construction of the Trylon and Perisphere, New York World's Fair site.]

[Construction of the New York World's Fair site.]