. Birds: the elements of ornithology . b ■. Fig. 141. Diagram op a Feather (with only three of its barbs indicated).A. Axis. Q. Quill. E. Eaohis, or shaft, or scapus. W. Vane, vexillum, orpogomum. F. Front half of vane or outer web. Hinder half ofTane or inner web. B. Three barbs or rami. 6. Barbules or Hyporaohis or afterahaft. Fig. 142. Diagram (afier Nitssch) of parts of Two barbs in vertical section. 6*. Anterior barbules. 6= 4». Poste-rior barbules. e. Barbieels, or barbulets, or hamuli, or booklets. Certain down-feathers are called pulviplwmes because theends of t

---

. Birds: the elements of ornithology . b ■. Fig. 141. Diagram op a Feather (with only three of its barbs indicated).A. Axis. Q. Quill. E. Eaohis, or shaft, or scapus. W. Vane, vexillum, orpogomum. F. Front half of vane or outer web. Hinder half ofTane or inner web. B. Three barbs or rami. 6. Barbules or Hyporaohis or afterahaft. Fig. 142. Diagram (afier Nitssch) of parts of Two barbs in vertical section. 6*. Anterior barbules. 6= 4». Poste-rior barbules. e. Barbieels, or barbulets, or hamuli, or booklets. Certain down-feathers are called pulviplwmes because theends of their barbs habitually break up into a fine powder calledpowder-down, such as may be remarked on Parrots The ordinary feathers which clothe the body and hide thedown are called contour feathers. Their basal barbs are com-monly soft. * See mte, pp. 86, 87. THE BXTBENAl STEIJOTrEB OT BIEDS. 139 Feathers may be considered as very complex hairs of a conical■form, which split up according to a definite pattern. Each is atfirst a little, soft,

---

Size: 1931px × 1294px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1800, bookdecade1890, bookpubl, booksubjectornithology