18 



L. William Oholm. 



(LIII 



20 

 10 

 1,100 

 90 

 1,080 

 20 

 10 

 1,300 

 90 

 80 

 70 

 60 

 50 

 40 



30 

 1,220 



x 



-2.3 4 5 G 7 8 9-1. 123456789 0. 



Figur II. 



