Every calling can be analyzed and the mental elements requisite for success in that particular line can be scientifically disentangled. Methods for testing the individual as to his possession of any one or all of the mental elements required in any given vocation may then be devised in the psychological laboratory. Furthermore, definite and scientific exercises can be formulated whereby the individual may train and develop special senses, faculties and powers so as the better to fit himself for his chosen field of work. [Sidenote: _Exercises for Developing Special Faculties_] The use of the experimental method is new to every department of science. Crude and occasional experiments have marked the advance of physics, physiology and chemistry, but it is only with the recent innovation of the scientific laboratory that these sciences have made their greatest strides. The employment of this method in dealing with problems of the mind is particularly new. So far as we are aware there is no school in all the world that employs definite and scientific exercises in the discipline and training of its pupils in power of observation, imagination and memory. You have now completed a brief survey of the fundamental processes of the mind and seen something of the practical utility of this knowledge. You have before you "sense-perceptions," "causal judgments," "classifying judgments," and "associated emotional qualities" or "feeling tones." Every suggested idea, every act of reasoning is in the last analysis the product of one or more of these elementary forms of mental activity. We shall now go on to consider the operations of these mental processes in connection with certain mental phenomena. [Sidenote: _Principles that Bear on Practical Affairs_] Our purpose in all this is not to teach you the elements of psychology as it is ordinarily conceived or taught. Our aim is to conduct you through certain special fields of psychological investigation, fields that within the past few years have produced remarkable discoveries of which the world, outside of a few specialists, knows little or nothing. In this way you will be fitted to comprehend the practical instruction, the application of these principles to practical affairs, toward which this _Course_ is tending. Transcriber's Note: Illustrations have been moved from their original positions, so as to be nearer to their corresponding text, or for ease of navigation around paragraphs. Duplicate chapter headers have been removed from the text version of this ebook and hidden in the HTML version. The following typographical corrections have been made to this text: Contents: Changed UNCONCIOUS to UNCONSCIOUS (UNCONSCIOUS TRAINING) Page 106: Changed 102 to 106 (shown facing page 106), to reflect repositioning of illustration in this ebook.