CHAPTER I.
MEMORY.
§ I.—Mental Reproduction.
I. Nature of the Process.
General Character.—As now defined, this is that form of mental activity in which the mind's former perceptions and sensations are reproduced in thought. The external objects are no longer present—the original sensations and perceptions have vanished—but by the mind's own power are reproduced to thought, giving, as it were, a representation or image of the original.
Example.—Suppose, for instance, that I have seen Strasburg minster, or the cathedral of Milan. Months, perhaps years pass away. By-and-by, in some other and remote part of the world, something reminds me of that splendid structure; I see again its imposing front, its lofty towers, its airy pinnacles and turrets. The solemn pile rises complete, as by magic, to the mind's eye, and, regardless of time or distance, the faculty of simple conception reproduces the object as it is.
Conceptions of Sound.—In like manner I form a conception, more or less distinct, of sounds once heard. The chanting of the evening service in the Church of the Madeleine at Paris, and the prolonged note of a shepherd's horn among the Alps, are instances of musical sound that frequently recur with startling distinctness to the mind. The same is to some extent true of the sensations and perceptions derived from the other senses. With more or less vividness the objects of all such sensations and perceptions are capable of being reproduced in conception.
The Conceptions not of Necessity connected with the Recollection of Self as the Percipient.—In these cases there may or may not be a connection of the object, as it lies before our minds, with our own personal history as the former percipients of that object. The time, place, circumstance, of that perception may not be distinctly before us; even the fact that we have ourselves seen, heard, felt, what we now conceive, may not, at the moment, be an object of thought. These are the elements of memory or mental recognition, and are certainly very likely to stand associated in our minds with the conception of the object itself. But not always nor of necessity is it so. There may be simple conception of the object, mental reproduction, where there is, for the time being, no recognition of any thing further. The Strasburg minster, the chanting of the choir, the note of the mountain horn, the snowy peak of Jungfrau, may stand out by themselves before the mind, abstracted from all thought of the time, the place, the circumstances in which they were originally perceived, or even from all thought of the fact that we have at some former time actually perceived these very objects. They may present themselves as pure conceptions.
Conceptions vary in some Respects.—Our conceptions vary in respect to definiteness and clearness. The objects of some of the senses are more readily and also more distinctly conceived than those of others. The sense of sight is peculiar in this respect. A visible object is more easily and more distinctly conceived than a particular sound or taste. The sense of hearing is, perhaps, next to that of sight in this respect; while the sensations of taste and smell are so seldom the objects of distinct conception, that some have even denied the power of conceiving them. Dr. Wayland maintains this view. That we do form conceptions more or less distinct of the objects both of taste and smell, as, e. g. of the taste of a melon, or the smell of an orange, hardly admits of question; while, at the same time, it is doubtless true that we have less occasion to reproduce in thought the objects now referred to than those of sight and hearing, that they are recalled with less facility, and also with less distinctness.