Columbia subject headings:
Aesthetics.
Arts, Modern--19th century--Themes, motives.
Image (Philosophy)--History--19th century.
Photography--History--19th century.
Visual perception--History--19th century.
Harvard subject headings:
Aesthetics, Modern--19th century.
Arts--19th century.
Photography--History--19th century.
Princeton subject headings:
Aesthetics, Modern--19th century.
Arts--19th century.
Photography--History--19th century.