Well, You asked for it here is the starling truth...The effect of fatigue upon memory raises the larger question of the relation between different sorts of fatigue. The belief is quite general that, when one is mentally tired, change of occupation gives sufficient rest. This is probably true only when fatigue is not fatigue, but ennui. Work becomes monotonous and we think that we are tired. Indolence is often taken for fatigue. In such cases change of occupation is refreshing. Even another book treating of a different subject brightens the mind. Mere change, with its new sights, and sounds, and people, breaks the dead level of monotony. One grows tired of seeing the same persons and hearing them say the same things. So one finds that "fatigue" vanishes in another town or city, though the conditions for work may be no better in other respects. For this reason it is mental economy occasion-ally to pack one's grip and begin anew in another place. Change of scenery clears the mind. The writer invariably finds that the "fatigue" of the year disappears and that work can be continued with renewed vigor when vacation permits a change of habitat. Sometimes, again, one has sat so long that the muscles are tired. Exercise or a brisk walk in the open is then a relief. Moderate muscular exercise is also stimulating. The abundant oxygen of the fresher air also plays its part.