Graphic charts make an effective tool to use as part of a display.

Interesting problems in large scale displays were brought to the fore during the construction of exhibits at the New York World's Fair, 1939. The turntable in the Ford Building weighing 152 tons with its exhibit was so heavy that a major foundation problem was involved. The solution was to float the turntable on a circular moat filled with 20,000 gallons of water. The turntable is revolved by a two horsepower electric motor.

The "futurama" of General Motors is the largest scale model animated diorama ever constructed. The 35,538 square-foot panorama is a conception of America and its highways in 1960

Gardner Display* Company, Pittsburgh. Pennsylvania.

Mechanical Exhibit of the National Tube Company.

This display tells how seamless pipe is pierced from solid steel. The rolling and piercing operation is shown in the center of the display.

DISPLAYS AND EXHIBITS

Gardner Ditplayt Company, Pittsburgh. Pennsylvania.

A. Scale Model of a Plant.

This model of a Bethlehem Steel heat treating plant was built for industrial shows. A synchronized voice explains operations of the model.

Gardnrr Displays Co.. Pittsburgh. Pennsylvania.

B. Exhibit of the National Cash Register Company at the Business Show of 1938 in New York City.

This small stage was six feet ten inches wide, six feet five inches high, and four feet seven inches deep. The characters were approximately twenty inches high. A sound mechanism controlled the action and voice of each of the five men. At the Business Show, an eight minute playlet was re-enacted.