159 



current. It was not so. O K was the 

 real effective electromotive force, requir- 

 ing mere division by the resistance to 

 represent the current, as in ordinary 

 steady flow. In a good diagram, it only 



Fig. 33 



needed a pair of dividers to work out 

 results which, so far as the scale allowed, 

 were as complete as the results of analysis. 

 That was why they were so extremely 

 valuable. He would now mention the 

 details of the diagram (Fig. 33) with 



