Lange, Friedrich Albert 1828-1875 The History of Materialism and Criticism of Its Present Importance; 1
Schweitzer, Albert 1875-1965 On the Edge of the Primeval Forest, and More From the Primeval Forest: the Experiences and Observations of a Doctor in Equatorial Africa
Richardson, Charles Albert 1875- Richardson Letters: Letters Written to Albert Richardson From 1832 to 1881; With Biographical Sketches and a Partial Genealogy of the Richardson Family