Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: CHAPTER III. EXPRESSION IN MAN AND IN ANIMALS. The act of expression does not prove vitality—In living things expression is the outcome of nutrition—Nutrition not considered here, only its expression—Expression when the outcome of processes in the subject is called direct—Growth results from locul nutrition; such processes are termed trophic— Nutrition is an expression of life—Permanent impressionability; it is opposed to evolution, it may be expressed hy reflex action—Retentivenesa need not be permanent.—Development and reflex action as modes of expression—Apparatus for reflex movement; reflexes may bo congenital, or acquired— Reflected action, as expression by form or colour—Any outcome of function may bo expressive—Expression by colour, sound, change of function in a part—Movements of an actor in anger —Trophic action illustrated by the growth of crystals, growth of the body—Coincident development of parts; coinnident defects in imbeciles—Properties demonBtrutud by external forces—Heredity—Expression of the emotions—Summary. In the last chapter the principles and modes of expression were described and discussed, and it seemed well to illustrate all points by examples taken from living and non-living subjects. The mere fact of expression in a subject is no evidence of vital characters, no proof that it is a living rather than a non-living thing. In the presentchapter we shall speak of expression in man and in animals, and the illustrations of modes of expression will, as far as possible, be taken from the cases of living beings. The great and striking general difference between the modes of expression in animate and inanimate subjects, is due to the fact that, in the former, vital properties and nutrition are essential. We will commence with the study of the signs of...