14 DARBISHIRE, Tables illustrating Statistical Correlation. 



graph, the successive pictures composing the film of which 

 were the successive dot-Tables on the Plate, would show 

 movement resulting from known causes. Cause, ' no dice 

 left down ' has effect 'circular blur.' Cause, ' 12 dice left 

 down' has effect 'diagonal line.' Cause, '6 dice left 

 down' has effect intermediate between last two effects. 



Imagine that you have a small model of a 'governor.' 

 If you do not touch it the arms hang down. If you spin 

 the axis as fast as you can, the arms lie in the same 

 straight line. Spin it at a moderate rate ; the arms make 

 an angle of 90 degrees to each other. 



Directly we can play with machinery we can see how 

 it works. Movement and change enable us to perceive 

 and to understand. 



The two squares intersected by diagonal lines in 

 Table I. are squares in which from the conditions of the 

 experiment a throw cannot fall. In the rest of the Tables, 

 the same is true of all the intersected squares and of all 

 the squares to that side of the intersected ones remote 

 from the diagonal of the Table. 



