XXXV.] THE SENSES. 1J7 



Till', facility of recalling the impressions of sight and 

 sound is the basis of the imaginative power, which, in so 

 far as it works with the materials of sense, works exclu- 

 sively with those of sight and sound, and produces the 

 results which we enjoy in music, in painting, and in the 

 rest of the arts. 



The cause of the facility of recalling the impressions of Canso of 

 sight and sound is, I have no doubt, hereditary habit, {jg'i'gj^^j^j. 

 Ever since the first dawn of the human intellect, men have habit, 

 been endeavouring to recall the words they have heard from 

 other men, in order to consider their meaning and what 

 they indicated ; and they have been endeavouring to recall 

 what they have seen, in order to decide where to go and 

 what to do. The power of reproducing sights and sounds 

 in memory has thus been cultivated by practice, and has 

 become hereditary. But no power could be developed 

 by habitual exercise, unless its germ existed previously. 

 The germ of memory, as shown in the chapter on Mental 

 Development, consists in the consciousness of a sensation 

 outlasting the sensation itself; and the next stage of its 

 development consists in the power of remembering a past 

 sensation when it is recalled by anything that has become 

 associated with it. In connexion with the visceral sensa- 

 tions and the unintellectual senses, the development of 

 memory stops here : in connexion with sight and hearing, 

 it goes on into recollection, or the power of recalling im- 

 pressions at will for the purposes of use and enjoyment, 

 And this, again, becomes the germ of imagination, 



At the risk of some repetition, I shall now enumerate 

 the different senses, with the priucix:)al characteristics of 

 each. 



1. The nerves of touch are also nerves of heat, but, the Seuses of 

 senses being distinct, an impression of touch and one of ]^°"j_ 

 heat occurring together are cognised in consciousness as 

 distinct: for instance, if I press my hand on a slab of These 



sp]i sfi i"i Oil ^ 



marble and feel it hard and cold, the hardness and the jo not 

 coldness are cognised os distinct sensations. combine. 



The sense of touch consists in the sense of pressure and 



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