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in large quantities, in an unanalyzed, vague form is put upon it, and then its delinquencies are passed carelessly over, it will become increasingly slovenly and unreliable in its work.

The second method of increasing the strength of the memory is found in deepening the original impressions which objects make upon us. Lively attention, active thought, sincere interest, these are the conditions under which the mind truly receives, and so easily retains the matter before it. Inertness, sluggishness, and wavering attention, in weakening first impressions, weaken also the memory. As, then, our interests is not likely to be universal, a concentration of it, an exclusion as well as an inclusion of topics, are needful, lest in dividing we weary and waste our forces, and make our faculties negligent.

The third aid to memory is reiteration. Facts which we are determined to retain, we must return to frequently, till we thoroughly possess them. The paths of memory are to be made smooth and hard by use. If we pass on to new material without returning often to the old, a process of separation and disintegration follows rapidly upon growth. "We need to integrate and re-integrate our material by resorting often to first principles. Thus, while we build layer upon layer around the core of knowledge, we are not to allow the circulation of thought to desert this heartwood, till it is compacted in perfect strength, and lies within, an insensible presence of power. The memory above other faculties demands reiteration, repeated integration of its material.

A fourth and yet more fundamental condition in the cultivation of memory is that our knowledge shall be made logical, coherent, and fairly complete in the departments it covers. The logical relations of truth greatly support the memory. If the topic is incapable of close connections, yet