SERIES OF MOVEMENTS. 277 



and takes cognizance of the attributes time and 

 quantity. 



The term " series of movements " may be quali- 

 fied in other ways than by the adjective "similar;" 

 we may have a good series of movements. In an 

 idiot the series of movements following upon the 

 sight of an apple are not good ; they are not such 

 as follow in a healthy child from the sight of an 

 apple. 



If we measure the size of the head and dif- 

 ferent parts of the body of the idiot, we shall 

 probably find that the proportions of such measure- 

 ments are not good ; they are not according to the 

 proportions established by anthopometry as the 

 normal for the age of the child. Mr. Roberts * has 

 constructed tables indicating such proportions for 

 normal children. If, further, we compare the series 

 of movements observed in the idiot, with the 

 normal series of movements, we shall probably 

 find the kinetic series as defective as the series of 

 measurements. The child's movements may be 

 recorded by the experimental method, f and analyzed 

 according to the principles of analysis^ and thus 

 compared with a normal series as ascertained by 

 previous experiments. 



Many other considerations as to the attributes of 

 a function might be presented as modes of expres- 

 sion, but sufficient has been said to illustrate the 

 principles of analysis advocated in this work. 



Some care has been taken to describe the attributes 

 of trophic and kinetic functions, in the hope that, 

 * Op. eit. f See chap. xix. \ Page 256. 



