FORCE AND MOTION 39 



engine, and every other machine is constructed by 

 force and motion. Every piece of music is sung or 

 played by force and motion. Every painting is made 

 by grouping two or more pigments (colors) together 

 in a particular manner by force and motion. 



Intellect, memory and will power are necessary 

 to produce two or more forces and motions in a 

 prescribed order and within a given time. For exam- 

 ple, each note in a piece of music requires, for its 

 production, a certain force and peculiar motion (vi- 

 bration) of cord, pipe or string within a certain time. 

 It is obvious that intellect, memory and will-power 

 are necessary to sing or play any piece of music. 

 Before anyone can speak any given word he must have 

 intellect, memory and will-power: (1) he must know 

 the word to be uttered, (2) he must remember it un- 

 til it is uttered, (3) he must have the will-power nec- 

 essary to exert the force and produce the motion of 

 air necessary to utter it. Let the reader speak the 

 words: " earth, " ''air," "fire," "water," and anal- 

 yze the process. 



Intellect, memory and will-power are necessary 

 to generate, guide, and control the forces and motions 

 required to make a watch or any other compound 

 machine or structure, within a given time. Suppose 

 that a watchmaker is required to make each spring, 

 wheel and part of a watch by hand, to put every part 

 in its place and start it to running on or about the 

 280th day after he begins the work. (Haeckel Ev. 

 Man, p. 199.) To do this work he must have intellect, 

 memory and will-power to generate, guide, and con- 

 trol and time the forces and motions which are nee- 



