Folks --
Now that I have had a chance to look up the history: 1. Sokal and Rohlf in 1962 (in Taxon) introduced the cophenetic correlation. 2. They had a distance called the "dendrogrammatic distance" which was (for the ultrametric trees they considered), half of the patristic distance. 3. Wartren Wagner mentions patristic distance in a 1968 review in Bioscience, but does not claim it. 4. JS Farris's paper showing that the cophenetic correlation is minimized when we achieve a least squares fit of tree to distances is in 1969 in Systematic Zoology. Joe ---- Joe Felsenstein, j...@gs.washington.edu Dept. of Genome Sciences, Univ. of Washington Box 355065, Seattle, WA 98195-5065 USA _______________________________________________ R-sig-phylo mailing list R-sig-phylo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-phylo