  Another earlier and little-known contribution on our topic was made by the Danish physician and neurologist, Carl Georg Lange (1834–1900). Lange’s book of 1899, Bidrag til Nydelsernes Fysiologi som grundlag for en rationel æstetik, the title of which can be translated quite literally as ‘Contribution to the Physiology of the Pleasures as Foundation for a Rational Aesthetics’, begins with a lengthy survey of the author’s ideas about the nature of the various sources of enjoyment or pleasure, and then moves on to apply these ideas to the arts and beauty.