§ 16. The Dependence of Visual Sensation upon Wave-length and

Energy of Light

§ 17. The Dependence of Visual Sensation upon Composition of Light

§ 18. The Dependence of Visual Sensation upon the Time and Space

Relations of Stimulus

71

§ 24. The Dependence of Auditory Sensation upon Wave-number of
Sound

97

§ 25. The Dependence of Auditory Sensation upon Composition of
Sound

§ 26. Beats and Intermediate Tones

§ 27. Combinational Tones

§ 28. Theory of Audition

References for Further Reading

SMELL

100

103

106

109

§ 29. Sight and Hearing, Taste and Smell

§ 30. The Olfactory Qualities

§ 31. Olfactory Sensation and Olfactory Stimulus .

§ 32. The Dependence of Olfactory Sensation upon the Composition

and Time-relations of Stimulus

§ 33. Theory of Smell

114

117

119

§ 46. The Tendinous Sense

§ 47. The Articular Sense

§ 48. Movement and Position, Resistance and Weight .

§ 49. The Alleged Sensation of Innervation .

$ 50. Some Touch-blends

References for Further Reading

§ 51. The Kinaesthetic Organs of the Internal Ear

§ 52. The Ampullar Sense

§ 53. Theory of the Ampullar Sense

§ 54. The Vestibular Sense

§ 55. Theory of the Vestibular Sense

References for Further Reading

OTHER ORGANIC SENSATIONS

§ 56. The Sensitivity of the Abdominal Organs

§ 57. The Sensations of the Digestive and Urinary Systems

§ 58. The Sensations of the Circulatory and Respiratory Systems .

$59. The Sensations of the Genital System

References for Further Reading

§ 64. Liminal and Terminal Stimuli

§ 65. The Just Noticeable Difference as the Unit of Measurement

§ 66. Weber's Law

§ 67. Theory of Weber's Law

References for Further Reading

AFFECTION

§ 68. Feeling and Affection

§ 69. Affection and Sensation

§ 70. Other Views of Affection

§ 71. The Methods of Investigating Affection

§ 72. The Tridimensional Theory of Feeling.

§ 73. The Dependence of Affection upon Stimulus

§ 74. The Bodily Conditions of Affection

References for Further Reading

ATTENTION

§ 75. The Attentive Consciousness

§ 76. The Development of Attention

§ 77. The Two Levels of Consciousness

$ 78. The Kinæsthetic and the Affective Factors in the Attentive Con-

sciousness

$ 79. The Experimental Investigation of Attention

§ 80. The Range of Attention

§ 81. The Duration of Attention

§ 82. The Degree of Attention

§ 83. Accommodation and Inertia of Attention

§ 84. The Bodily Conditions of Attention

References for Further Reading

INDEX OF NAMES

INDEX OF SUBJECTS

265

268

276

281

284

287

291

293

FIGURE

INDEX OF FIGURES

1. The Müller-Lyer Illusion

2. The Colour Pyramid

3. Model of the Colour Pyramid

4. Demonstrational Colour Mixer

5. Adaptation Frame

6. Wundt's After-image Apparatus

7. Contrast Frame

8. Contrast of Shadows

9. Perimeter

10. Hering's Colour-blindness Apparatus

II. Tuning-fork and Bottle

12. The Tonal Pencil

13. The Series of Auditory Qualities

14. Weighted Wire Fork and Galton Whistle

15. Stern's Variator

16. Set of Quincke Tubes

17. Koenig's Difference-tone Apparatus

18. Zwaardemaker's Olfactometer (for Solids)

19. Zwaardemaker's Olfactometer (for Liquids)

20. Horse-hair Point for Pressure Spots

21. Apparatus for Localising Warm and Cold Spots (Blix)

22. Map of Warm and Cold Spots (Blix)

23. Map of Pressure and Pain Spots (von Frey)

24. Exner's Model of a Semicircular Canal

25. Diagram of Continuous Scale of Noise Intensity

26. Lehmann's Acoumeter

213

27. Diagram of the Relation of S to R according to Weber's Law

(Wundt)

28. Discs for Demonstration of Weber's Law