Our mental life is a succession of conscious 'fields,'—They have a focus and a margin,—This description contrasted with the theory of 'ideas,'—Wundt's conclusions, note. Now the immediate fact which psychology, the science of mind, has to study is also the most general fact. It is the fact that in each of us, when awake (and often when asleep), some kind of consciousness is always going on. There is a stream, a succession of states, or waves, or fields (or of whatever you please to call them), of k