36 



THE BELL SYSTEM TECHNICAL JOURNAL, JANUARY 1952 



up to twelve seconds were obtained. These data are shown on Figs. 3 

 to 6. Fig. 3 is for the message rate individual class of service wth twenty- 

 line finders available. The data on this figure correspond to those on 

 Figs. 1(a) and 1(1)). Fig. 4 is for the message rate two-party class of 

 service with ten line finders and corresponds to Figs. 1(c) and 1(d). 

 Fig. 5 is for the flat rate class of service with ten hne finders and cor- 



Miaa 3NOi nvia aaivoiaNi 3hi nvhi u3iv3Ho 

 SAviaa a3b3iNnoDN3 ivhi stivd is31 3N0i nvia do iN3o asd 



