The study of the physical antedates the study of the mental always. In the history of the individual as well as of nations, knowledge of the psychical has dragged far behind mastery of tangible objects. We come in contact with our physical environment and adjust ourselves to it long before we begin to study the acts by which we have been able to control objects around us. It was inevitable, therefore, that attention should have been concentrated upon the material and mechanical side of production and distribution. Results there were so tangible, so easily figured. For example, if the speed of a drill or the strokes of a punch press were multiplied, the increase would be easily recognized.