Wing muscles of a Goose. Bi, Biceps: Elast. sec., elastic vinculum and Exp.sec., expansor secundariorum; Pt.br and Pt.lg, (From Newton's Dictionary of Birds, by permission of A. &amp; C. Black.)
Cleaned version of scanned EB image taken from: <a rel="nofollow" class="external text" href="http://projects.ericshalov.com/freeimages/image.php?id=251">http://projects.ericshalov.com/freeimages/image.php?id=251</a>.
Encyclopædia Britannica
1911
<a href="//commons.wikimedia.org/w/index.php?title=Encyclop%C3%A6dia_Britannica_Eleventh_Edition&amp;action=edit&amp;redlink=1" class="new" title="Encyclopædia Britannica Eleventh Edition (page does not exist)">Encyclopædia Britannica Eleventh Edition</a>, Vol. 3, Page 965