6 Pages in Charles Darwin's Library associated with "physical conditions - sexual arousal"

Elements of physiology
By: Müller, Johannes, - Baly, William,
Publication info: London, Taylor & Walton, 1838-1842
Volume: v.1
Pages: Page 698 Page 928 Page 1318 Page 1482
Naturgeschichte der Saeugethiere von Paraguay
By: Rengger, Johann Rudolph.
Publication info: Basel, Schweighauser, 1830
Pages: Page 48
Wissenschaftliches System der Mimik und Physiognomik
By: Piderit, T.
Publication info: Detmold, Klingenberg, 1867
Pages: Page 58