"In treating the subject a purpose has been kept in view, viz., to try to explain the principles involved in certain methods employed for the production of ornament, and this in order to guide the industrial designer to sure and certain results. To be successful the processes involved in the production of articles of manufacture must be understood, and to this the earnest attention of all interested in the improvement of manufacture should be directed. The abstract teaching of design is comparatively valueless, and success will only be achieved when to the taste of the designer the skill of the workman is united."