Under a huge, gleaming dome suspended from spiraling pipes, the GE exhibit, called "Progressland," depicts the history of electricity, from its beginning to the mighty bang of nuclear fusion. The multipart show, produced by Walt Disney, uses a unique theater. Here the seated audience is carried past a number of stages; there are reflecting mirrors, startling visual and sound projections, and in the climax, neutron counters and other instruments to document graphically the demonstration of controlled thermonuclear fusion.

* Admission: free.

* Length of show: 45 minutes; 250 people admitted every four minutes.

CAROUSEL THEATER. In the first part of the program, separate auditoriums, each holding 250 people, circle into position and are carried past stages on which life-sized, three-dimensional, animated human figures move, talk, laugh and act out the story of electricity in the home from the Gay '90s to the present.

¶ A late 19th Century home is shown. Its inhabitants struggle with all the latest luxuries: telephone, gas lamps, gramophone, kitchen pump, a hand-cranked clothes washer and a hand-pumped, air-suction vacuum cleaner.

¶ A home of the '20s comes next, with coffeemakers and sewing machines, "monitor"-topped refrigerators and a homemade cooling device for hot weather: an electric fan that circulates air over a cake of ice.

¶ The '40s are recalled with the little, round television screen, plus some odd applications of electricity: e.g., housewives mixing wallpaper paste with cake mixers.

¶ The glories of today glitter in a living room at Christmastime, a glass-enclosed, electrically heated patio, a kitchen that all but runs itself.

THE CORRIDOR OF MIRRORS. Visitors pass through a hall in which giant photos of General Electric scientists and engineers - at work on laser rays, space technology, nuclear experiments and low-temperature research - are reflected and re-reflected in mirrors.

THE SKY-DOME SPECTACULAR. By means of a dramatic new projection technique, the interior of the great dome is filled with the sights and sounds of the great natural sources of energy: fierce electrical storms, fire, a blazing sun and thousand of spinning atoms. A narrator describes man's historic search to harness energy and introduces the fusion experiment to follow.

FUSION ON EARTH. In the first demonstration of controlled thermonuclear fusion to be witnessed by a large general audience, a magnetic field squeezes a plasma of deuterium gas for a few millionths of a second at a temperature of 20 million degrees Fahrenheit. There is a vivid flash and a loud report as atoms collide, creating free energy (evidenced on instruments).

ELECTRIC LIVING. Apart from the scheduled show, a model all-electric community is on display with the latest electric innovations for the home, public buildings, industry and space exploration.