INDEX 



Analysis, 37. 



Anatomy of the inner ear, 14, 69, 



81, 87. 

 Beats, 55, 58, 66, 107, 115, 118. 

 Birds, 5, 136. 

 Brain, 23. 



Clay experiment, 8. 

 Cochlea, 1 . 



Comparative anatomy, 135. 

 Comparative psychology, 136. 

 Computation, 24, 28. 

 Corti's organ, 16, 22, 136. 

 Difference tones, 37, 59, 68, 84, 123. 

 Disappearance of higher tone, 84, 122. 

 Duality of the organ, 131. 

 Ear, 1, 14. 



Elasticity, 12, 18, 20, 87. 

 External ear, 1. 

 Fluid displacement, 76, 90, 95. 

 Graphic methods, 28, 39. 

 Inflection points, 85, 89, 92. 

 Inner ear, 14. 

 Intensity, 32, 34, 42, 68, 77, 79, 96, 



122, 129. 

 Labyrinth, 3. 

 Leather seated chair, 12. 

 Leverage of the ossicles, 5. 

 Mean tone, 56, 58. 

 Middle ear, 3. 

 Ossicles, 5. 

 Overtones, 31. 



Partition, 11. 



Pathology, 132ff. 



Phase, 35, 44, 47ff. 



Pillars of Corti, 16, 136. 



Pinna, 1. 



Pressure on partition, 88. 



Provisional assumptions, 25, 33, 69, 



87. 95. 

 Reissner's membrane, 21. 

 Resonators, 19. 



Psychological observation, 82, 137. 

 Safety valve, 14, 22. 

 Sensitiveness of the ear, 83. 

 Snail, 1. 



Sounding bodies, 32, 130. 

 Stirrup, 4. 



Subjective tones, 37, 59. 

 Tension, 19. 

 Tone combinations : 



2 and 3; 35, 44, 48, 49. 

 24 and 25; 50, 58. 



4 and 9; 62, 77. 

 1 and 2; 85, 93. 



5 and 8; 96, 103, 109, 113, 



118, 122. 



3 and 8; 124. 



Tone intensity, 32, 34, 42, 68, 77, 



79, 96, 122. 129. 

 Tympanum. 4. 

 Weber's law, 129. 

 Windows, 3, 6. 



