Smithsonian miscellaneous collections . 21. A secondary quill with hook and curved fibers of Coluiiiha livia Magnified i:6o 22. Hook-fibers of a secondary quill of Colnmba livia. Magnified i:iio 23. Surface view of the upper side of a hand-reme.\ of Cygmis olor, showing the terminal parts of thehook-fibers. Magnified 1:270 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. ts, PL. XII

---

Size: 1534px × 1630px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience