But whether the critics are right, or I am, on this first point, the critics are wrong about the relation of the magazine-articles to the book. With a single exception all the chapters were written for the book; and then by an afterthought some of them were sent to magazines, because the completion of the whole work seemed so distant. My lack of capacity has doubtless been great, but the charge of not having taken the utmost pains, according to my lights, in the composition of the volumes, cannot justly be laid at my door.
Psychology defined; psychology as a natural science, its
data, 1. The human mind and its environment, 3. The pos-
tulate that all consciousness has cerebral activity for its condi-
tion, 5.
Incoming nerve-currents, 9. Terminal organs, 10. 'Spe-
cific energies,' 11. Sensations cognize qualities, 13. Knowl-
edge of acquaintance and knowledge-about, 14. Objects of
sensation appear in space, 15. The intensity of sensations, 16.
Weber's law, 17. Fechner's law, 21. Sensations are not
psychic compounds, 23. The law of relativity,' 24. Effects
of contrast, 26.
The eye, 28. Accommodation, 32. Convergence, binocular
vision, 33. Double images, 36. Distance, 39. Size, color
40. After-images, 43. Intensity of luminous objects, 45.
The ear, 47. The qualities of sound, 43. Pitch, 44.
bre,' 45. Analysis of compound air-waves, 56. No fusion of
●lementary sensations of sound, 57. Harmony and discord, 58.
Discrimination by the ear, 59
TOUCH, THE TEMPERATURE SENSE, THE MUSCULAR SENSE,
AND PAIN
End-organs in the skin, 60. Touch, sense of pressure, 60.
Localization, 61. Sensibility to temperature, 63. The muscu
lar sense, 65. Pain, 67.
The feeling of motion over surfaces, 70. Feelings in joints,
74. The sense of translation, the sensibility of the semicircu-
lar canals, 75.
THE STRUCTURE OF THE BRAIN
Embryological sketch, 78. Practical dissection of the sheep's
brain, 81.
THE FUNCTIONS OF THE BRAIN
The frog's nerve-
What the hemi-
General idea of nervous function, 91.
centres, 92. The pigeon's nerve-centres, 96.
spheres do, 97.
of functions, 104.
sensory and motor, 105.
The visual region, 110.
region, mental deafness, 113. Other centres, 116.
The automaton-theory, 101. The localization
Brain and mind have analogous elements,'
The motor zone, 106. Aphasia, 108.
Mental blindness, 112.
SOME GENERAL CONDITIONS OF NEURAL ACTIVITY
The nervous discharge, 120. Reaction-time, 121. Simple
reactions, 122. Complicated reactions, 124. The summation
of stimuli, 128. Cerebral blood-supply, 130. Brain-thermome
try, 131. Phosphorus and thought, 132.
Its importance, and its physical basis, 134. Due to pathways
formed in the centres, 186. Its practical uses, 138. Concate
nated acts, 140. Necessity for guiding sensations in secondarily
automatic performances, 141. Pedagogical maxims concerning
the formation of habits, 142.
THE STREAM OF CONSCIOUSNESS
Analytic order of our study, 151. Every state of mind forms
part of a personal consciousness, 152. The same state of mind
is never had twice, 154. Permanently recurring ideas are a
fiction, 156. Every personal consciousness is continuous, 157.
Substantive and transitive states, 160. Every object appears
with a 'fringe' of relations, 163. The 'topic' of the thought,
167. Thought may be rational in any sort of imagery, 168.
Consciousness is always especially interested in some one part
of its object, 170.
The Me and the I, 176. The material Me, 177. The social
Me, 179. The spiritual Me, 181. Self-appreciation, 182. Self-
seeking, bodily, social, and spiritual, 184. Rivalry of the Mes,
186. Their hierarchy, 190. Teleology of self-interest, 193.
The I, or 'pure ego,' 195. Thoughts are not compounded of
'fused' sensations, 196. The 'soul' as a combining medium,
200. The sense of personal identity, 201. Explained by iden-
tity of function in successive passing thoughts, 203. Mutations
of the self, 205. Insane delusions, 207. Alternating person-
alities, 210. Mediumships or possessions, 212. Who is the
Thinker, 215.
The narrowness of the field of consciousness, 217. Dis-
persed 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.
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