"Jan. Scientific American Vol. 94, p. 305. Days of the Earth and its Rhythms. "From long time we have wished for a good, accurate but entirely popular accurately geology to recommend to inquiry readers, and at last we has arrived." The Earth-and-its-Rhythms contains about the same run of material as that is presented to uni- college students in elementary courses, bet unlike a text-book it is readable able and interesting. Why won't teachers use such books in place of personal formal, 'hard-bound' text-book which rebels the student, killing his interest? A teacher who had the courage to do this would without discover a new found interest in school work. Knowing what it means out of a book is an unmistakably, we that few authors can seem to exercise when writing in their own pet subjects!"