61

Logic 61

in the interest of psychology itself to restrain it from flowing over into the region of logic. As for abstraction I shall endeavor in the course of this volume to pit before the reader reasons for thinking that it is a wholly unpsychological matter the doctrine of which has gone far astray in consequence of the admixture pf psychology with it.
Something like psychological association certainly appears in logic but in order that the relation of logical association to psycholgical association a relation mote interesting to the psychologist than to the logician may become clearly understoof it is desirable that the two theories should be developed sepearately and side by side.
The notion that a normative science is necessarily of the nature of a practical art in having no independent value as a pure theory is one which