CONTENTS OF VOL. II. IX 



the future — Emotions due to association — Sympathy — Love of beauty, of 

 knowledge, and of holiness — Summary — Tabular statement — Second tabular 

 statement. 

 Note : — There are unconscious sensation and thought — I believe there is no 

 unconscious feeling Pp. 65—82 



CHAPTER XXXIV. 



MENTAL GROWTH. 



Analogy between the organism and the mind in development by differentiation — 

 Organic and mental integration — Analogy of organic and mental growth — The 

 organism is constructed out of the food by the organic intelligence : so mind 

 is constructed out of impressions of sense by the mental intelligence — ^Assimi- 

 lation and waste both most rapid in youth — Parallel in receiving and forgetting 

 mental impressions — Organic and mental growth both consist in excess of what 

 is received over what is lost — Waste is a condition of organic life : so is for- 

 getting of mental life — If we remembered everything, we could not think — 

 Coalescence of residua by forgetting — What constitutes familiarity — Words 

 must not only suggest their meaning : they must suggest nothing else — The 

 first of these is secured by remembering, the second by forgetting — Summary — 

 Formation of habits of action by the same law — Moral benefit of forgetting — 

 Forgetting is a case of the laws of habit Pp. 83 — 91 



CHAPTEE XXXV. 



THE SENSES. 



External senses — That of heat is distinct — The muscular sense belongs to touch — 

 The skin-nerves are nerves of both touch and heat ; as are also the nerves of 

 taste ; and these sensations do not combine with each other : but two tastes or 

 smells, when mixed, combine into a resultant of character intermediate between 

 their constituents : so of mixed colours — Orange — White — Sounds do not so com- 

 bine, but may be discriminated — Reason of this in the constitution of the nerves 

 of hearing — The nerves of smell, sight, and hearing transmit no other sensation — 

 Probable cause of sensations of different kinds being transmitted by the same 

 nerve without combining — Only touch and sight give perception of space — 

 Intellectual senses : touch, sight, and hearing— Reproduction in memory of 

 impressions of sight and hearing — Pleasure due to this — Its moral importance- 

 Cause of this in hereditary habit — Senses of touch and heat — These sensations 

 do not combine — What touch cognises is resistance — Muscular sense — Taste — 

 Smell : its resemblance to taste— Sight, or the sense of colour— Only some 

 luminous undulations produce the sense of light, and these excite various sen- 

 sations of colour — Sight gives cognition of space — Characters of sight — Of 

 hearing— Semicircular canals give a sense of the direction of sounds— Hearing 

 is unlike the other senses in the power of discriminating simultaneous sounds 



