Catalogued
Double-mass curve
- Made by
- US hydrologic practice; standardised by James Searcy and Clayton Hardison
- Year
- 1930s-1960
- Field
- Earth science and hydrology
- Kind
- Data display
- Room
- Change over time — Placed by reading its description, not yet studied
17 other forms share this skeleton
Source
Searcy and Hardison 1960, Double-mass curves, USGS Water-Supply Paper 1541-B
Attribution less certain: contested, or no single inventor recorded