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

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

[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 New York World's Fair site, with the steel frames of the Trylon and Perisphere in the background.]

[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 with shadow of Trylon visible, 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.]

[New York World's Fair site during construction, showing the steel frames of the Trylon and Perisphere.]

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

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