Key points are not available for this paper at this time.
One / The Preparatory Phase.- I. Franz Brentano (1838-1917): Forerunner of the Phenomenological Movement.- II. Carl Stumpf (1848-1936): Founder of Experimental Phenomenology.- Two / The German Phase of the Movement.- III. The Pure Phenomenology of Edmund Husserl (1859-1938).- IV. The Older Phenomenological Movement.- V. The Phenomenology of Essences: Max Scheler (1874-1928).- VI. Martin Heidegger (1889- ) as a Phenomenologist.- VII. Phenomenology in the Critical Ontology of Nicolai Hartmann (1882-1950).
McGill et al. (1962) studied this question.