1. The problem is illustrated by the attempt of J. F. Herbart to develop a science of psychology which would escape Kant's criticisms of the possibility of an experimental science of psychology. Herbart produced a formal, somewhat mathematical, science, though grounded upon experience. See, for example, the account of Herbart in Boring E.G.A history of experimental psychologyNew York 1950 250 261
2. The senses and the intellect.
3. Among the many accounts of the development of German psychology, E. G. Boring's is especially to be recommended Boring E.G.A history of experimental psychologyNew York 1950 250 261
4. Wilhelm Wundt