CHAPTER III.

ILLUSIONS OF PERCEPTION: GENERAL.

_Psychology of Perception_:--The Psychological analysis of Perception,
19, 20; Sensation and its discrimination, etc., 20, 21; interpretation
of Sensation, 22, 23; construction of material object, 23, 24;
recognition of object, specific and individual, 24-27; Preperception
and Perception, 27-31; Physiological conditions of Perception, 31-33;
Visual and other Sense-perception, 33, 34.

_Illusions of Perception_:--Illusion of Perception defined, 35-38;
sources of Sense-illusion, 38-40: (a) confusion of
Sense-impression, 40-44; (b) misinterpretation of Sense-impression, 44;
Passive and Active misinterpretation, 44-46; Passive Illusions as
organically and extra-organically conditioned, 46-49.

CHAPTER IV.

ILLUSIONS OF PERCEPTION--_continued_.

A. _Passive Illusions (a) as determined by the Organism._
_Results of Limits of Sensibility_:--Relation of quantity of Sensation to
that of Stimulus, 50-52; coalescence of simultaneous Sensations,
52-55; after-effect of Stimulation, 55, 56; effects of prolonged
Stimulation, 56-58; Specific Energy of Nerves, 58, 59; localization
of Sensation, 59-62; Subjective Sensations, 62-64.

_Results of Variation of Sensibility_:--Rise and fall of Sensibility,
64-67; Paraesesthesia, 67, 68; _rationale_ of organically conditioned
Illusions, 68, 69.

CHAPTER V.

ILLUSIONS OF PERCEPTION--_continued_.

A. _Passive Illusions (b) as determined by the Environment._
_Exceptional Relation of Stimulus to Organ_:--Displacement of organ,
etc., 70-72.

_Exceptional Arrangement of Circumstances in the Environment_:--
Misinterpretation of the direction and movement of objects, 72-75;
misperception of Distance, 75, 76; Illusions of depth, relief, and
solidity in Art, 77-81; Illusions connected with the perception of
objects through transparent coloured media, 82-84; visual transformation
of concave into convex form, 84-86; false recognition of
objects, 86, 87; inattention to Sense-impression in Recognition,
87-91; suggestion taking the direction of familiar recurring experiences,
91, 92.

CHAPTER VI.

ILLUSIONS OF PERCEPTION--_continued_.

B. _Active Illusions._

Preperception and Illusion, 93-95.

_Voluntary Preperception_:--Choice of interpretation in the case of
visible movement, 95, 96; and in the case of flat projections of form,