374 THE CA T. [CHAP. xi. 



increase of intensity, change into one of the latter, for they differ 

 not in degree, but in kind. 



Into this question, however, it is not desirable, for the object of 

 this work, further to enter. It is the less necessary so to do, 

 because the subject has been treated at length in a book which may 

 be regarded as introductory to the Author's present work. I refer 

 to " Lessons from Nature as manifested in Mind and Matter," and 

 especially to its 4th, 5th, 6th, and 7th chapters, in which the dis- 

 tinctions of kind which exist between the mental powers of man and 

 the analogous powers of brutes are considered in detail. 



5. Such then, in the judgment of the present writer, are the 

 most significant facts and the most important deductions with respect 

 to the cat's psychology in the commonly used meaning of that 

 word. But, as has been here observed more than once, the term 

 " Psychology " has and should have a much wider meaning, and 

 embrace all the vital activities, of whatsoever kind, of which any 

 animal is capable. 



These activities are of very different orders. Some of them are 

 manifestly (like those of locomotion) activities of the entire creature. 

 Others (like the activities of digestion or respiration) involve a large 

 portion of the animal's body ; while others again (such as those which 

 result in the formation of a nerve-cell or a blood- corpuscle) are 

 activities which are confined to only very minute portions of its 

 frame. 



Yet the whole of these activities must proceed harmoniously, or 

 the animal could not continue to live in health and strength. Its 

 body is obviously a unity. The activities of that body are in some 

 way CO-ORDINATED and UNIFIED also. To understand this fully, is 

 truly to understand Psychology. 



6. In the foregoing chapters we have considered both the several 

 parts of which the cat's body is made up, and also the functions which 

 they severally and collectively perform. We have also noted the 

 successive modifications and transformations which take place during 

 development i.e., those series of forms which are assumed by the 

 developing animal, between the condition of the unimpregnated ovum 

 and that of the adult cat. 



We have seen (1) in the first place that the cat's body is made 

 up of a collection of " systems " of organs, such as the nervous 

 system, the muscular system, and the alimentary, circulating, 

 respiratory, and generative systems ; (2) secondly, we have seen that 

 each such system is made up of a number of " organs," which act 

 together in harmony. Thus we have seen, e.g., that the nervous 

 system consists of a brain, a spinal cotfd, sympathetic ganglia, and 

 various sets of nerves, some of these nerves energizing by the help 

 of special parts, called " sense-organs " the functions of the whole 

 being some form of sensitivity. Again, the alimentary system we 

 have seen to consist of a mouth with jaws, tongue and teeth, of an 

 oesophagus, a stomach and an intestine with accessory glandular 

 structures the function of the whole being to minister to alimenta- 



