A large 3D physical visualization made by the Detroit Edison Company showing electricity consumption for the year 1935, with a slice per day and each day split into 30 min intervals. Two other examples from different Edison electricity companies are discussed in Brinton's book. These physical visualizations seem to have been used to better anticipate power demands.
- Willard Cope Brinton (1939) Graphic Presentation pp 364-365.
- Howard A. Spielman (2006) "Virtual Reality" Circa 1935.