188 EVOLUTION AND MAN S PLACE IN NATURE 



when she can have no part in tending the young life. 

 Results depend partly on development of the bud, 

 partly on the functions of the organic gerai. As it is 

 impossible to account for the action of the mother by 

 reference to mechanical arrangements of particles in 

 the germ/ or by conditions of tension and movement 

 in the organism of the mature insect, or by mere 

 shock and impact consequent on her alighting on 

 the bud, though all these things are certainly in 

 cluded ; so it is impossible to explain the procedure of 

 the insect by past experience or by processes of 

 reasoning. There is nothing of the inferential, as 

 there is nothing of watchfulness over the young life, 

 such as is witnessed in the case of the mother bird. 

 The organic impulse, is certainly more akin to ap 

 petite than to rational procedure, for there is extreme 

 sensibility, acted upon by the state of the bud. These 

 conditions secure exact adaptation of means to ends, 

 and to ends unknown to the worker. Structural 

 adaptations to functions of the life seem invariably 

 recognised in the action of instinct, just as in the 

 simpler actions of our own life, such as the winking of 

 the eyes, shrinking from pain, changing of posture 

 when uneasy. Structure and instinct are correlated. 

 Darwin is obviously correct when he says instincts 

 certainly do vary/ and variations are due to change 

 in feeling consequent on change of environment. 



This whole range of observations as to animal 

 instinct, and the speculations following, have been 

 seriously entangled and perplexed by introduction of 

 the analogies of intelligent procedure. Until we have 

 separated instinct from intelligence, no trustworthy 

 advance can be made towards a scientific explanation 



