Winfield S Hall: 3 books

I have no hesitancy in saying that it is by far the best presentation of this very important subject that I have ever seen. It answers many important questions for which I have seen no answer elsewhere."--=Prof. William R. Manning, Purdue University

I. GENERAL ACTIVITIES OF LIVING ORGANISMS. The casual observer, even if he watches thoughtfully the various activities of plants and animals, would hardly believe these activities capable of classification into two general classes. He notes the germination of the plant seed and its early growth, step...