Descriptive Psychology represents a series of lectures given by Franz Brentano in 1890; they were the culmination of Brentano's work and the clearest statements of his mature thought. It was this later period which proved to be so important in the work of his student Husserl. This is the first English translation of the work. Muller has added a concise introduction which places Brentano's work within the historical context of philosophy and psychology. Muller also locates Brentano's influence on contemporary thinkers such as Husserl, Meinoning, Bertrand Russel and the entire Polish school of philosophy.