Studied from its original page
Balance (counter-poise) chart
mechanical illustration of the equation of exchange (Fisher) · balance or counter-poise chart (Karsten)
- Made by
- Irving Fisher; two-factor elaboration by Karsten 1923
- Year
- 1911
- Field
- Economics and markets
- Kind
- Data display
- Room
- Parts of a whole
Not shown here: its rights are not cleared
See the original page — Fig. 2, printed p. 21 (archive leaf n48)
Published 1911 (A) and sole author Fisher died in 1947, so life+70 ended in 2017 (B); the one caveat is that Brown is on the title page, and if he counted as co-author B would fail (protection to the end of 2045). Held as unchecked (D-045): if Brown counts as co-author, test B fails until 2045.
The data it needs
sideleft or right of the identity · categoricaltermidentity (money, deposits, trade, a named good) · categoricalweight_factorweight · quantitative · quantity units (dollars, hundredweights, feet)arm_factorlever arm · quantitative · per unit (turnover per year, price per unit)periodsmall-multiple index (Karsten Fig. 476) · temporal · year
Built in 7 steps, as its maker described
ch. II §3, pp. 21-23, Figs. 2-3
121 other forms share this skeleton
Source
Attribution less certain: contested, or no single inventor recorded