Studied from its original page

Piper trilinear diagram

Piper plot · Piper diagram

Made by: Arthur M. Piper
Year: 1944
Field: Earth science and hydrology
Kind: Data display
Room: Parts of a whole

Not shown here: its rights are not cleared

See the original page — Fig. 37, printed p. 179 (PDF page 18 of section5.pdf)

Test A passes (USGS federal work, 17 USC 105) but test B fails: a government work published in 1985 is past the 1955 cutoff.

The data it needs

entity identity · categorical
composition_a value · compositional · 3 parts, percent
composition_b value · compositional · 3 parts, percent
magnitude symbol size · quantitative

Built in 7 steps, as its maker described

not opened (the DOI resolves to Wiley's AGU site, which returned 403); title, volume 25, issue 6, pp. 914-928 and June 1944 confirmed from the DOI metadata

Skeleton drawing, not the original plate

1 other forms share this skeleton

Source

Piper 1944, Trans. AGU 25

Attribution checked against the source

Searches, not citations

archive.org commons.wikimedia.org scholar.google.com