Studied from its original page
Nested-zone dot circles
Distribution of the causes of accidents in Hartford, Conn. (Brinton's caption)
- Made by
- Travelers Insurance Co., Hartford
- Year
- by 1939
- Field
- Management and industry
- Kind
- Data display
- Room
- Parts of a whole
Not shown here: its rights are not cleared
See the original page — Brinton 1939, p. 319, chart A
Fails both tests: 1939 is after 1930 (A) and the page is Brinton's book, tied to Brinton who died in 1957 (B would run to 2027).
The data it needs
categoryidentity (one chart each) · categoricalzonecontainment · categorical · inner or outercountdots and printed number · quantitative · events
Built in 4 steps, as its maker described
p. 319, chart A (archive leaf n324)
14 other forms share this skeleton
Source
Brinton 1939, Graphic Presentation (Travelers Insurance chart)
Attribution less certain: contested, or no single inventor recorded