CONTENTS. 
The visual axes 
Ocular movements . 
The horopter . 
Estimation of the size and flistanne of phjects 
Solidity . 
Protective mechanisms of tha are 
Special considerations . 
Comparative 
Evolution 
Pathological 
Brief synopsis of the ° physiology of vision 
HEARING 
General . 
Anatomical 
The membrana tympani 
The auditory ossicles 
Muscles of the middle ear 
The Eustachian tube 
Pathological . 
Auditory impulses . 
Auditory sensations, perceptions, judgments 
General . 
Auditory jadguient: F 
Range of auditory discrimination . 
Special considerations 
Comparative . 
Evolution 
Synopsis of the shesiplosg of ‘hearing . 
Tue SensE or SMELL 
Anatomical 
General . 
Comparative . 
THE SENSE oF TASTE 
Anatomical 
General . 
Experimental . 
Pathological 
Comparative 
THE CEREBRO-SPINAL SYSTEM « or Nenves 
1. Spinal nerves 
General . 
Exception é 
Additional experiments . 
Pathological . 
2. The cranial nerves 
General . 7 
The motor-oculi, or third nerve 
The trochlear, or fourth nerve 
The abducens, or sixth nerve. 
The facial, or seventh nerve . 
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