THE CONTENT-QUALITIES ^j 



intensity, but their number is fixed by the number of dis- 

 tinguishable sensations. I can easily determine how many 

 degrees of intensity, or " thresholds ", I can distinguish in 

 a red fluid, from complete saturation to complete colourless- 

 ness. But I may choose quite arbitrarily any particular 

 degree of intensity as the starting-point, and determine the 

 thresholds either in the direction of saturation or of colour- 

 lessness. 



THE INDICATIONS 



In constructing the world, mental sensations become pro- 

 perties of things ; or, in other words, the subjective qualities 

 build up the objective world. If we put the mark-sign in 

 place of the sensation or subjective quality, we may say that 

 the mark-signs of our attention become " indications " as to 

 the world. Accordingly, the laws that are binding for the 

 internal mark-signs must also hold good for the external indica- 

 tions. Immutable laws of this kind we call natural laws. All 

 the dicta of physics relate to indications of the world, and are 

 based on the laws that fall to their share as mark-signs of our 

 attention. The fact that, like the moments in time, the places 

 in space cannot be interchanged nor the intervals between 

 them altered, is put beyond all question merely because such 

 relations depend on the form of our attention which precedes 

 all experience. By means of this theory, Kant laid bare, for 

 all to see, the very foundations of human knowledge. 



This theory, however, must be applied in the same way to 

 all the indication-circles. The number of indications, as well 

 as their arrangement, precedes all experience. Even if this 

 arrangement is not extensive, and so cannot be directly 

 intuited, still the law of the regular increase in indications 

 from threshold to threshold is immediately certain for each 

 indication-circle. From the very beginning, with aU the 

 inevitability of Nature, the distance between the thresholds 



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