Tavernor, Robert (2007). Smoot's Ear: The Measure of Humanity. New Haven, Conn: Yale University Press. pp. 166. ISBN978-0-300-12492-7.. Hermann Lotze, Geschichte der Aesthetik in Deutschland, 1868, discusses Zeising on pp. 306–309 and reports Fechner's critique in Archiv für zeichnende Künste, 1865, p. 100, that the golden ratio measurements of the Holbein and Sixtini Madonnas do not agree, whereby Fechner concluded that Raphael avoided rather than sought the golden ratio in painting. Lotze himself is sceptical, but he finds Fechner's experiments using surveys of viewers promising.