CHAPTER XIII.

ATTENTION 217

The narrowness of the field of consciousness, 217. Dispersed attention, 218. To how much can we attend at once? 219. The varieties of attention, 220. Voluntary attention, its momentary character, 224. To keep our attention, an object must change, 226. Genius and attention, 227. Attention's physiological conditions, 228. The sense-organ must be adapted, 229. The idea of the object must be aroused, 232. Pedagogic remarks, 236. Attention and free-will, 237.