ABSTRACT
THE work of Cherniss on Aristotle's criticism of the Presocratics may be compared with that of Jaeger on the development of Aristotle's own thought as contained in his Aristoteles of 1923. Jaeger modestly described that epoch-making work as a Gruttdlegung or foundation for the history of the philosopher's development, and as such it has been of value not only for itself but in the stimulus it has given to further study, in the course of which the balance of its conclusions has been to some extent altered. Cherniss's own study is of the same pioneer kind, and if I confess to a feeling that it goes rather too far, the comparison with the now classic work of Jaeger will, I hope, make clear my general admiration and appreciation of the fact that it is a permanent contribution with which all future scholarship will have to reckon.
