. Carnegie Institution of Washington publication. GENERAL DISCUSSION. 99. 13 14 15 16 17 18 19 20 21 •» «3 24 25 20 27 28~29 30 31 32 33 34 35 3G 37~38"''39 Fm. 9-'.—Hypothetical polygons to illustrate centers of variation and evolution bv Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington

---

Size: 1297px × 1925px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1910, bookyear1910