56 PHYSICAL EXPKESSION. 



any kind, but we need not here stop to enter upon 

 that philosophical problem which depends upon the 

 law of the conservation of energy. Work done as 

 the result of movement is positive proof of the move- 

 ment having occurred, therefore work done is the 

 result of the activity of the agent that produces it. 

 It follows that work done may be just as good an 

 expression as is movement. This is an important 

 principle of expression, and different examples must 

 be examined. A certain amount of labour may be 

 performed by a man, such as raising water from 

 a well to a high cistern by means of a pump, or a 

 certain area of land may be dug over in the day's 

 work ; the amount of energy spent in this labour 

 will be some kind of expression of the man's brute 

 strength. The number of pages of writing ac- 

 complished by a literary man is some expression of 

 his mental toil. A fine work of art, painting, or 

 sculpture is the expression of capacity in the artist, 

 and it is also an indication of the quantity of his 

 exertion in a given time. 



One effect of movement in man and animals is 

 to produce locomotion; locomotion is work done 

 by movement. If all movements may be expres- 

 sive, locomotion may be expressive of the quantity, 

 time, and kind of work done. Is not the manner 

 of a man's walk often highly expressive ? In 

 a man the manner of walking is characteristic of 

 the individual. We may also find types of walk. 

 There is the man whose rapid strides indicate his 

 excitement, and the slow and dawdling walk 

 indicative of purposeless aim. The step may be 



