General Psychology in 1899

Rational Psychology: Or, the Subjective Idea and the Objective Law of All Intelligence by Hickok, Laurens Perseus

The Human Intellect; With an Introduction Upon Psychology and the Soul. by Porter, Noah

Das Gefühl: Eine Psychologische Untersuchung by Ziegler, Theobald

Schizophrenia and Civilization by Torrey, E. Fuller