CHAPTER IINTRODUCTION Science. Before attempting to define psychology, it will be helpful to make some inquiry into the nature of science in general. Science is knowledge; it is what we know. But mere knowledge is not science. For a bit of knowledge to become a part of science, its relation to other bits of knowledge must be found. In botany, for example, bits of knowledge about plants do not make a... more...

INTRODUCTION The medical profession is justly conservative. Human life should not be considered as the proper material for wild experiments. Conservatism, however, is too often a welcome excuse for lazy minds, loath to adapt themselves to fast changing conditions. Remember the scornful reception which first was accorded to Freud's discoveries in the domain of the unconscious. When after years of... more...

MUIRHEAD LIBRARY OF PHILOSOPHY An admirable statement of the aims of the Library of Philosophy was provided by the first editor, the late Professor J. H. Muirhead, in his description of the original programme printed in Erdmann's History of Philosophy under the date 1890. This was slightly modified in subsequent volumes to take the form of the following statement: "The Muirhead Library of... more...

SENSES. Sight.—Light.—Five minutes after birth, slight sensibility to light (2). Second day, sensitiveness to light of candle (3). Sixth and seventh days, pleasure in moderately bright daylight (3, 4). Ninth and tenth days, sensitiveness greater at waking than soon afterward (3). Sleeping babes close the eyes more tightly when light falls on the eyes (4). Eleventh day, pleasure in light of candle... more...

PREFACE. In this little book I have endeavoured to maintain the simplicity which is the ideal of this series. It is more difficult, however, to be simple in a topic which, even in its illustrations, demands of the reader more or less facility in the exploration of his own mind. I am persuaded that the attempt to make the matter of psychology more elementary than is here done, would only result in... more...

CHAPTER IWHAT IS PSYCHOLOGY? Wise men study the sciences which deal with the origins and development of animal life, with the structure of the cells, with the effect of various diseases upon the tissues and fluids of the body; they study the causes of the reactions of the body cells to disease germs, and search for the origin and means of extermination of these enemies to health. They study the laws of... more...

A DOMINIE IN DOUBT I. "Just give me your candid opinion of A Dominie's Log; I'd like to hear it." Macdonald looked up from digging into the bowl of his pipe with a dilapidated penknife. He is now head-master of Tarbonny Public School, a school I know well, for I taught in it for two years as an ex-pupil teacher. Six days ago he wrote asking me to come and spend a holiday with him, so... more...

FASTING GIRLS. I. ABSTINENCE IN THE MIDDLE AGES. Among the many remarkable manifestations by which hysteria exhibits itself, for the astonishment of the credulous and uneducated portion of the public, and—alas, that it should have to be said,—for the delectation of an occasional weak-minded and ignorant physician, the assumption of the ability to live without food may be assigned a prominent place.... more...

The Senses in the Lower Animals The sense of touch—The senses of taste and smell—Actinophryans having taste—The sense of sight—Modification of sight organs by surroundings—Sight in Actinophryans—Blind fish sensitive to light—Blind spiders—Blind man—Primitive eyes in Cymothoe—In the jelly-fish, sea-urchin, Alciope, Myrianida—The sight organs of the snail—Power of vision in the... more...

INTRODUCTION Having read with much care the proof sheets of this book, I am prepared to say three things about it, and it gives me pleasure to say them here. THE BOOK IS WELL NAMED. "THE UNFOLDING LIFE." Turn which way we will, we see life unfolding all about us, and yet how faintly are its mysteries understood! And is it not the one thing above all others, which teachers, mothers, fathers and... more...