Electricity display and booth

Photograph shows PG & E display and booth on electricity. The signs read, "Eyes are Precious, Light is Cheap" and "Here's one way to Light A Lamp / The Best Way is With PG & E Low Rate Electricity!" A bicycle appears to be set up in the booth to be riden to generate power to light the lightbulbs on the back wall of the booth. Material from a large tent appears above this scene.