Studied from its original page
Zeuner three-dimensional frequency surface
Zeuner three-dimensional frequency surface · the curved surface of the living (krumme Fläche)
- Made by
- Gustav Zeuner
- Year
- 1869
- Field
- Statistics
- Kind
- Data display
- Room
- How a group spreads

See the original page — Fig. 1, printed p. 9 (leaf n22); Fig. 3 on p. 15 (leaf n28, https://archive.org/download/abhandlungenaus00zeungoog/page/n28_w2000.jpg)
Published 1869 (A) and Zeuner died in 1907, so life+70 ended in 1977 (B).
The data it needs
birth_timeposition · temporal · yearageposition · quantitative · yearssurvivorsvalue (height) · count · persons
Built in 8 steps, as its maker described
Fig. 1, in-text woodcut, printed p. 9 (leaf n22); Fig. 2, p. 13 (leaf n26, blank in this scan); Fig. 3, p. 15 (leaf n28); construction and sections pp. 9-16 (leaves n22-n29)
3 other forms share this skeleton
Source
Zeuner 1869, Abhandlungen aus der mathematischen Statistik
Attribution less certain: contested, or no single inventor recorded