FOR THE FIELD AND FIELD TRIALS. 2/ 



understands, and yet be unable to instruct a dog, 

 whose mental capacity is so dissimilar and therefore 

 so misunderstood. Let the trainer carefully note 

 how the dog learns ; how much his intellect can com- 

 pass lesson by lesson and how much as a whole; 

 what to teach step by step and how to do it, at 

 the same time retaining his pupil's affection and con- 

 fidence. 



As to instinct, nothing is more difficult to define 

 in fact, the definition of it has never been satisfac- 

 torily given by even the greatest philosophers. Ab- 

 struse speculations concerning it have been advanced, 

 but they are in that broad realm of speculation where 

 the intangible reigns. No one can tell how the colt, 

 when its age is measured only by minutes, is impelled 

 to suckle its dam and succeeds in doing so, or how it 

 knows enough to follow her about, or how it recog- 

 nizes and obeys her voice; or how young birds know 

 how to build a nest without ever having seen one 

 built, or how they know that it is necessary to build 

 them at all ; or how they have the migratory impulse 

 and know the proper direction to take when they mi- 

 grate, or how the grub knows how to spin an en- 

 velope around itself, etc. The manifestations of in- 



