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CHAP. III. Spectral Illusions arising from the Hysteric Tem.
perament,
81
IV. Spectral Illusions occurring from Plethora ; for in-
stance, from the Neglect of accustomed periodi.
cal Blood-letting,
86
V. The Spectral Illusions which occasionally occur as
Hectic Symptoms,
91
VI. Spectral Illusions from Febrile and Inflammatory
Affections,
94
VII. Spectral Illusions arising from Inflammation of
the Brain,
99
VIII. Spectral Illusions arising from a highly-excited
State of Nervous Irritability acting generally
on the System,
112
IX. The Spectral Illusions of Hypochondriacks, 117
X. Certain less frequent Morbid Sources of Spectral
Illusions,
119
PART III.
PROOFS THAT THE OBJECTS OF SPECTRAL ILLUSIONS ARE
FREQUENTLY SUGGESTED BY THE FANTASTIC IMAGERY
OF SUPERSTITIOUS BELIEF.
CHAP. I. Explanation of the Mode in which the Ideas which
are suggested by various Popular Superstitions
become recalled in a highly-vivified State, so as
to constitute the Imagery of Spectral Illusions, 125
II. Remarks on the Apparitions of Good Spirits, re-
corded in Popular Narratives,
138
III. General Remarks on the Apparitions connected
with Demonology,
160
IV. General Remarks on the Apparitions of Departed
Spirits,
191
PART IV.
AN ATTEMPT TO INVESTIGATE THE MENTAL LAWS WHICH
GIVE RISE TO SPECTRAL ILLUSIONS.
CHAP. I. General Object of the Investigation which follows, 241
II. Indications afforded by Mental Excitements, that
Organs of Sensation are the Medium through
which past Feelings are renovated,
244 Page
CHAP. III. The various Degrees of Excitement, of which
Ideas, or the renovated Feelings of the Mind,
are susceptible,
258
IV. An Inquiry into those Laws of Mental Conscious.
ness which give rise to the Illusions of Dreams, 272
V. Phantasms may arise from Ideas of which the
Mind might otherwise have been either con-
scious or unconscious,
282
VI. The Effect of Morbific Excitements of the Mind
when heightened by the vivifying Influence of
Hope and Fear,
295
VII. The Illusions which Hope and Fear are capable of
exciting independently of the Co-operation of
Morbific Causes,
305
VIII. Mental Excitements distinguished as partial or
general,
311
IX. General Mental Excitements considered as the
Result of Morbific Causes co-operating with
moral Agents,
315
X. The frequent Effect of general Morbific Excite.
ments in rendering the Mind unconscious either
of pleasurable or painful Feelings,
319
XI. The Influence of any prevailing moral Disposition
may be so increased by a Morbific Excitement,
as to be productive of Spectral Impressions of a
corresponding Character,
323
XII. When moral Agents which exert a pleasurable In-
fluence are heightened in their Effects by the
Co-operation of Morbific Excitements of a si-
milar pleasurable Quality, the Mind may be
rendered totally unconscious of opposite or pain.
ful Feelings,
340
XIII. When moral Agents which exert a painful In.
Co-operation of Morbific Excitements of a simi.
lar painful Quality, the Mind may be rendered
totally unconscious of opposite or pleasurable
Feelings,
347
XIV. Proofs that, during intense Excitements of the
Mind, no less than during Syncope and Sleep,
the Causes which exclusively act upon Organs
of Sensation eventually extend their vivifying
Influence to the Renovation of past Feelings,
353
XV. When Morbific Causes of Mental Excitement ex-
ert to their utmost Extent their stimulating
Powers, they often change the Quality of their
Action, as from Pleasure to Pain, or from Pain
to Pleasure,
361
Chap. XVI. When Causes act acutely upon Organs of Sensa-
tion, and are unremittingly prolonged, they oc-
casionally change the Quality of their Action ;
as, for instance, from Pain to Pleasure. Ideas
likewise partake of this Change of Excitement, 367
PART V.
SLIGHT REMARKS ON THE MODIFICATIONS WHICH THE IN-
TELLECTUAL FACULTY OFTEN UNDERGOES DURING IN-
TENSE EXCITEMENTS OF THE MIND,
377
PART VI.
SUMMARY OF THE COMPARATIVE DEGREES OF FAINTNESS,
VIVIDNESS, OR INTENSITY SUBSISTING BETWEEN SENSA-
TIONS AND IDEAS, DURING THEIR VARIOUS EXCITEMENTS
AND DEPRESSIONS.
Introduction,
391
CHAP. I. The various Excitements and Depressions connect-
ed with the Sleeping and Dreaming States, 393
II. The Order of Phenomena observable in extreme
Mental Excitements, when Sensations and Ideas
are conjointly rendered more vivid,
409
III. The Images of Spectral Impressions differ from
those of Dreams in being much more vivid, 429
NOTES,
441
DIRECTIONS TO THE BINDER.
FORMULA (contained in a Tabular View) of the various compa-
rative Degrees of Faintness, Vividness, or Intensity, supposed to subsist between Sensations and Ideas, when conjointly excited
or depressed, -to face page 392. Wood Cut of Grotesque Carvings over the Door of the Cheetham
Library, Manchester,-illustrative of the Demonology of the Middle Ages,--to face page 172.
