 After 1911, evidence points to how both Ortega and Hartmann pursued particular interests of phenomenology. Hartmann, who succeeded Natorp as Chair at Marburg in 1924, eventually became important in the philosophical developments of Martin Heidegger and Hans-Georg Gadamer. In 1912, Ortega began to study phenomenology “seriously” and in 1913, he recollected years later, the Jahrbuch für Philosophie und Phänomenologische Forschung, Edmund Husserl’s Ideen (Ideas Pertaining to a Pure Phenomenology, [1913, 1982]), and Formalism in Ethics and Non-Formal Ethics of Values of Max Scheler were published. Later that year, in a series of articles which were published in the Revista de Libros, Ortega wrote a long review of Heinrich Hoffman’s dissertation, Studies on the Concept of Sensation, which had been presented to the University of Göttingen during the same year. In the essay, which discussed the descriptive psychology of one of the lesser known students of the Göttingen Circle, Ortega remarked that