1064 The Relations of Mind and Matter; (November; 
will be no apparent difference, except in the greater vividness and 
sharpness of the latter. And it is remarkable how new impres- 
sions of an object annex themselves to those previously received, 
and thus fill out the original image. Our first idea of the human 
body is a mere outline. To this are gradually added impressions 
of its distinctive surface parts, its internal organs, its tissues, cir- 
culation, &c., its motions, and its general principles of formation 
and physiological functions. Each of these falls into its proper 
relation with the others, building up a full ideal image of the 
body. But this image retains the character of a manikin. It can 
be taken apart at will, and each part considered separately from 
the rest. This essential peculiarity pertains to all ideal concep- 
tions. They have none of the necessary coherence of natural 
organisms. The conception never becomes an indissoluble men- 
tal image. It may be anatomized, as the body may, but without 
need of the slow process of dissection. 
As to the part taken by the different senses in building up this 
mental picture there are important distinctions. Some yield us 
impressions of form and some of quality. The senses of smell, 
taste and hearing simply advise us of certain qualities or condi- 
tions of external things. Touch and sight also yield impressions 
of quality, but of form as well. They acquaint us with the space 
extension of objects, and also with their space relations and 
motions. It appears strange how the mind can gain a permanent 
record of the motions of one body in relation to others. We 
can only comprehend it as a record of form relations with time 
extension, the sensory impression of a very rapidly succeeding 
series of pictures on the mind, in each of which the relation ot 
position of objects is changed. On recalling to consciousness 
this series of pictures the idea of movement must arise with it, 
precisely as occurs in the optical toy where a series of gradually 
pictures are blended by rapid succession on a moving 
disk, and the figures made to appear as if in actual motion. The 
impression of a musical air on the mind is probably of analogous 
character to the above, a time succession of differing sensations. 
The reason has much to do with the correctness of our impres- 
sions of form. The eye receives its picture as a flat one, and it 
_ must t affect the mind as such. The blind restored to sight s¢¢ 
idity of pea Yet the inept on the retina of the eye 
es as flat pictures. Touch is necessary to make sure of 
: 
