File:The descent of man, and selection in relation to sex (1873) (20246456623).jpg

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Title: The descent of man, and selection in relation to sex
Identifier: descentofmansele187302darw (find matches)
Year: 1873 (1870s)
Authors: Darwin, Charles, 1809-1882
Subjects: Evolution; Natural selection; Sexual selection in animals; Human beings -- Origin; Sexual dimorphism (Animals)
Publisher: New York : D. Appleton and Co.
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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Cha.p. XIV.) GRADATION OF CHARACTER. 137 A B C toward the left-band upper corner, the feather being held erect, in the position in which it is here drawn. Beneath this thickened part there is on the surface of the ball an oblique almost pure-white mark which shades off downward into a pale-leaden hue, and this into yellow- ish and brown tints, which insensibly be- come darker and dark- er toward the lower part of the ball. It is this shading, which gives so admirably the effect of light shining on a convex surface. If one of the balls be examined,' it will be seen that the lower part is of a browner â lint onrl i« inr1itl v- Fig. 56.âPart of Secondary wing-feather of lint ana is maisuncuy An?us pheaBanti BhowinJ two, a and &, Per- covkivn+pfl \\xr n pnrvprl feet ocelli. A, B, C, etc., dark stripes run- sepai atea Dy a curvea ni?g obliquely'downi each to an ocellus. oblique line from the (Much of the web on both sides, especially to . the left of the shaft, has been cut off). upper part, which is yellower and more leaden; this oblique line runs at right angles to the longer axis of the white patch of light, and indeed of all the shading; but this difference in the tints, which cannot of course be shown in the woodcut, does not in the least interfere with the perfect shading of the ball.48 48 When the Argus pheasant displays his wing-feathers like a great fan, those nearest to the body stand more upright than the outer ones,
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Flickr tags
InfoField
  • bookid:descentofmansele187302darw
  • bookyear:1873
  • bookdecade:1870
  • bookcentury:1800
  • bookauthor:Darwin_Charles_1809_1882
  • booksubject:Evolution
  • booksubject:Natural_selection
  • booksubject:Sexual_selection_in_animals
  • booksubject:Human_beings_Origin
  • booksubject:Sexual_dimorphism_Animals_
  • bookpublisher:New_York_D_Appleton_and_Co_
  • bookcontributor:MBLWHOI_Library
  • booksponsor:MBLWHOI_Library
  • bookleafnumber:151
  • bookcollection:biodiversity
  • bookcollection:MBLWHOI
  • bookcollection:blc
  • bookcollection:americana
  • BHL Collection
  • BHL Consortium
Flickr posted date
InfoField
25 August 2015

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18 September 2015

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current22:18, 17 September 2015Thumbnail for version as of 22:18, 17 September 2015974 × 1,690 (607 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{subst:chc}} {{information |description={{en|1=<br> '''Title''': The descent of man, and selection in relation to sex<br> '''Identifier''': descentofmansele187302darw ([https://commons.wikimedia.org/w/index.php?title=Special%3AS...

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