Morphology is the science of form. The word is used in various scientific disciplines, e.g. in geography, linguistics, etc., but it is most frequently employed to denote that part of Biology which deals with the forms of organisms. The mere description of spatial relations, however, scarcely constitutes a science. It may be hard to say by what property science is distinguished from other human endeavors, but that factual description does not suffice is generally admitted. To establish relations between facts may be taken as a preliminary answer. It would still remain to define these relations. The answer to that question, however, depends largely on the particular brand of philosophy to which an author happens to subscribe. Most answers have been formulated by focusing attention largely on physics and related sciences.