In our volume of this series, devoted to the consideration of the Memory, we have related a number of exercises and methods, similar to those given above, by which the Perception may be cultivated. Perception plays a most important place in memory, for upon the clearness of the percepts depends to a great degree the clearness of the impressions made upon the memory. So close is the connection between Memory and Perception that the cultivation of one tends to develop the other. For instance, the cultivation of the Memory necessitates the sharpening of the Perception in the direction of obtaining clear original impressions; while the cultivation of Perception naturally develops the Memory by reason of the fact that the latter is used in testing and proving the clearness and degree of Perception. This being the case, those who find that the exercises and methods given above are too arduous may substitute the simple exercise of remembering as many details as possible of things they see. This effort to impress the memory will involuntarily bring into action the perceptive faculties in the acquirement of the original impressions, so that in the end the Perception will be found to have developed. Teachers and those having to do with children should realize the great value of the cultivation of Perception in the young, and thus establishing valuable habits of observation among them. The experience and culture thus acquired will prove of great value in their after life. As Brooks well says on this subject: "Teachers should appreciate the value of the culture of the perceptive powers, and endeavor to do something to afford this culture. Let it be remembered that by training the powers of observation of pupils, we lead them to acquire definite ideas of things, enable them to store their minds with fresh and interesting knowledge, lay the foundation for literary or business success, and thus do much to enhance their happiness in life and add to the sum of human knowledge." CHAPTER VII. REPRESENTATION Sensation and Perception, as considered in the preceding chapter, are what are called by psychologists "Processes of Presentation." By Presentation is meant the direct offering to the consciousness of mental images or objects of thought. If there were no faculty of the mind capable of retaining and _re_-presenting to the consciousness the impression or record of Perception, we could never progress in knowledge, for each percept would be new each time it was presented and there would be no recognition of it as having been previously perceived, nor would there be any power to voluntarily recall any percept previously acquired. In short, we would be without that power of the mind called Memory.