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is dependent-Bones of the Arm--Radius and Ulna-Cavities and Tuber-
cles-Bones of the Fingers—The Thumb-Muscles of the Hand-Rapid
Movements of the Hand-Covering of the Hand-Nails of the Fingers-
The Spider Monkey-Nerves-Paw of the Lion-Value of the Hand-

Praise to God . . . . . . . . . . . . 65

Sound-Air a Medium of Sound-Sound conveyed by solid Bodies--
Sonorous Bodies-Vibrations—External Structure of the Ear-Internal
Structure-The Bones—Tympanum-The Labyrinth and Cochlea—The
Sense of Hearing inferior in Animals-Sense of Hearing in Reptiles-
Snake Charmers--Ear of the Common Barn Owl-Hearing in Mammalia
--The Long-eared Bat-Ears of the Horse-Special provision for the Whale
-The Human Ear-Musical Sound—Velocity of Sound-Extraordinary

Echo-Faith cometh by hearing . . . . . . . . . 97

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