Catalogued
Isopleth (contour computing) chart
- Made by
- Léon Lalanne; later widespread
- Year
- 1843-1900
- Field
- Nomograms and computing charts
- Kind
- Computing chart
- Room
- Charts that compute — Placed by reading its description, not yet studiedCould also hang in: Values across a surface
0 other forms share this skeleton
Source
Hewes and Seward 1923, The Design of Diagrams for Engineering Formulas
Attribution less certain: contested, or no single inventor recorded