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

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

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

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

[New York World's Fair. Pile driver with Perisphere and Trylon in background. Construction view.]

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

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

[Trylon under construction, New York World's Fair site.]

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

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

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

[New York World's Fair site under construction, showing the Electrical Products building and the frame of the Trylon.]

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

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

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

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

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