EXPRESSION BY MOVEMENTS. 6U 



of their bodies is synchronous, and they maintain 

 their same relative positions; if their rates are 

 unlike, one gets an advance of the other, but after 

 a while they meet again, and the times of the suc- 

 cessive meetings or coincidences is a calculable 

 matter if the rates of movement are known. 



Turning back from these abstract considerations to 

 our proper subject, expression by movements, a few 

 examples will show how the one bears upon the 

 other. In discussing one mode of expression of the. 

 hands, we say, " The fingers of the hand are opened 

 and closed in rapid sucession, indicating the excited 

 and angry feeling of the man." Now, here the 

 movements of five subjects, five digits, are said to 

 coincide, they move synchronously, opening and 

 closing. Now, such synchronous movements may 

 result from the equal pace at which each finger 

 tends to move, or they may result from an organic 

 connection between the cause of each movement. 

 The same facts of movement may be differently 

 expressive, according to the causation of the syn- 

 chronous action. Problems may arise, then, in 

 considering modes of expression, in which the ex- 

 pression is described in terms of coincidences or 

 combinations of movement. A series of movements 

 may occur in any one subject, or, considering two 

 or more movements as regards their time, a series 

 of combinations may occur in definite sequence. 

 The number of possible combinations of synchronous 

 movements is strictly limited by the number of 

 movements considered ; if the number of movements 

 considered be n, the number of possible synchronous 



