8o THEORETICAL BIOLOGY 



of the other subject, if both the sounds appear there as 

 indications in it ; and so forth. 



The observer's chief task consists in determining the 

 number and the nature of his own quaUties appearing in the 

 surrounding -world of the other subject ; and he has to in- 

 vestigate also in what grouping they act as indications there. 



We can divide up the surrounding-world of every other 

 subject into two halves, as will be explained fully later on. 

 The one contains those of the observer's indications that affect 

 the animal as such ; on that account, I call it the world-as- 

 sensed. The other contains those of the observer's indications 

 to which the animal reacts ; this I call the world of action. 



Now, since one and the same object, on the one hand, 

 affects the animal with separate properties as indications, 

 and, on the other, has properties affected by the animal, the 

 boundary between the two worlds passes through the object. 



Let us assume that indication C in the figure on the pre- 

 ceding page represents the scent of honey, and the indication 

 D its fluidity, then it is obvious that, if the animal is a bee, 

 the indication C, which acts on the animal, lies in the world- 

 as-sensed, whereas the indication " fluidity," which makes it 

 possible for the bee to drink, lies in the world of action. 



It is only in our own surrounding-world that honey, as 

 a sweet-scented fluid, is fused into one unified object ; in the 

 surrounding-world of the bee this does not happen, for the 

 indication fluidity does not act on the bee, but merely under- 

 lies the bee's behaviour. 



In order that we may not sacrifice the indissoluble con- 

 nection which, as observers, we perceive to exist between the 

 two properties of the object honey, I propose that, when we 

 are considering the surrounding- world of another subject, we 

 employ the term " indicators " for such of our objects as play 

 a part in that world. This will be used to mean that here 

 certain indications are indissolubly associated, which, how- 



