E D TEUER AERE RR ERES : TEENS 
EEE 
  
  
  
courses. The stronger light points which correspond to the time marks are indi- 
cated by little circles. These correspond to stronger impulses of the current 
which were arranged in differences of time of about "hs second. The plotting 
permits therefore also of determining the way passed over in units of time. 
There should not be any doubt that the stereoscopical plotting of move- 
ments opens up quite new perspectives for the scientific study of working pro- 
cesses and for the determination of working dispositions allowing to obtain 
maximal results.