Go back to article: Visualising electricity demand: use and users of a 3D chart from the 1950s

Figure 8

Colour photograph of two individual chart cards from a 1950s three dimensional chart showing electricity demand over time

© Science and Industry Museum/Science & Society Picture Library

Cards showing pencil and red pen ink marking the values onto the card. The red pen ink continues for a sequence of cards

DOI: http://dx.doi.org/10.15180/180905/014