THE CONTENT-QUALITIES 73 



and green. It may be of medium hardness, but never both 

 hard and soft ; it may be lukewarm, but never both hot and 

 cold at the same time. 



This circumstance (i.e. that at each place properties from 

 all the relationship circles may be assembled, but never more 

 than one single quality from each) shows that the qualities 

 of each circle are connected together by law in such a way 

 that the appearance of one quality excludes the simultaneous 

 appearance of a related quality at the same place. 



As soon as it enters into activity, the material of our mental 

 qualities reveals a form governed by law, which form may 

 enter into appearance along with space and time, or must 

 especially be sought out for the content-qualities. Since only 

 the form of the extensive quality-circles of the local signs and 

 direction-signs is given by intuition, we must try to include 

 within that extensive form the intensive quality-circles, in 

 order to arrive at a clear idea of the laws governing them. 

 To admit of comparison between the extensive qualities them- 

 selves, we have already expressed in spatial terms the form 

 of the moment-signs, which is 



not intuited ; and so we shall /?ea^ Ye/Zoiy 



m. * 



now attempt to represent m 



terms of space the other 

 quality-circles likewise. 



In looking for a spatial form 

 for the laws obtaining in the 

 quality-circle of colours, the ^ 

 best thing is to start with the 

 spectrum of sunlight thrown ^^^^ ^^g-^ ^'^^^'^ 

 by a prism. When we do this, 



four fixed points immediately strike our eye, at which certain 

 colours emerge pure from the mixture. The point of pure 

 yellow follows the red, then comes the green, and finally the 

 pure blue. Between every two points of pure colour lie 



