A slideshow connected to a lecture of Twentieth-Century Photography available at Art History Teaching Resources (http://arthistoryteachingresources.org/), written by Beth Saunders.
2. Jacob Riis, In the Home of an
Italian Ragpicker, New Jersey, ca.
1889, Albumen print.
Lewis Hine, Child in Carolina Cotton
Mill, 1908, Gelatin silver print on
masonite.
4. Edward Steichen, The Flatiron,
1904, Gum bichromate over
platinum print.
Alfred Stieglitz, The Flatiron,
(published in Camera Work),
1903, Photogravure on vellum.