Studied from its original page

Silhouette bar-chart

silhouette curve-bar (Karsten) · silhouetting · the same curve seen from its end

Made by: Karl G. Karsten (name and account); his examples draw on the Survey of Current Business, and one is credited to Carl Snyder
Year: 1923
Field: Economics and markets
Kind: Data display
Room: Change over time

Not shown here: its rights are not cleared

See the original page — Fig. 251 'A Detailed Form', printed p. 289 (archive leaf n340)

Test A passes (published 1923) but test B fails: Karsten died in 1968 (B would run to 2038).

The data it needs

item identity · categorical
group grouping (Karsten divides long lists into logical groups, p. 293) · categorical
latest value · quantitative · index, base period = 100
previous value · quantitative · index
max_since_base value · quantitative · index
min_since_base value · quantitative · index
reading_date depth order (recency) of each reading · temporal

Built in 6 steps, as its maker described

ch. XXV 'Silhouette Bar-Charts', pp. 285-293, Figs. 248-254

Skeleton drawing, not the original plate

8 other forms share this skeleton

Attribution less certain: contested, or no single inventor recorded