[15] _Cf._ Driesch: _Philosophy of the Organism_; _Vitalismus als Geschichte und Lehre_; his article in _Lebensanschauung_ (a collection of essays by twenty German thinkers, 1911); Reinke's _Philosophie der Botanik_; McDougall's _Body and Mind_; Thomson's _Heredity, Evolution_, and _Introduction to Science_ (the two latter in the Home University Library). Bergson's _Creative Evolution_ deals with the subject, but the value of this book is greater in other directions. T.H. Morgan's _Regeneration_ is a weighty contribution to the subject. [16] A revival of the study of Kant's first _Critique_ would be of great value to our natural scientists. Green, in his _Prolegomena to Ethics_, has interpreted this aspect in a manner that ought not to be forgotten. _Cf._ further Edward Caird's _Evolution of Religion_, vol. i. [17] Ward's _Naturalism and Agnosticism_, vol. i., is a reply to this important question. [18] _Cf._ Muensterberg's _Psychology and Education_, and his _Eternal Values_; also Royce's _The World and the Individual_. [19] This trans-subjective aspect has been worked out in an original way by Volkelt in his _Quellen der menschlichen Gewisskeit_. [20] The works of Muensterberg and Rickert deal with great clearness on this difference of subject-matter in science and history. [21] The main weakness of Bergson's philosophy seems to be in not recognising this problem. Bosanquet, in his _Principle of Individuality and Value_, has very clearly recognised and interpreted it upon similar lines to Eucken. [22] In this respect Eucken and Bergson seem to agree, although it is difficult to reconcile this aspect of Bergson's with his statements concerning the grasping of reality in the perceptions of the moment. [23] "Hegel To-day," _The Monist_, April 1897. [24] _Truth of Religion_, p. 328. [25] Green has dealt with this aspect in the first part of his _Prolegomena to Ethics_ in practically the same way as Eucken. _Cf._ also Nettleship's _Life of Green_ and his (Nettleship's) _Philosophical Remains_. [26] This need of differentiation has been presented by Muensterberg in a powerful manner in his _Psychology and Life, Eternal Values_, and _Science and Idealism_. [27] Muensterberg's _Science and Idealism_, p. 10; _cf._ also his _Grundsuge der Psychologie_, Bd. i., 1900. [28] Wundt's _Grundriss der Psychologie_ and the article "Psychologie" in _Philosophie im beginn des Zwanzigsten Jahrhunderts (Festschrift fur Kuno Fischer_, art. 1). [29] _The Truth of Religion_, pp. 178 _f_.