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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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