622 



BELL SYSTEM TECHNICAL JOURNAL 



b3 Lost articles 

 total =439 

 average = 1 . 04 



b4 Number 12 

 total =421 

 average =0.84 



b5 Fires** 

 total =9487 

 average =26.1 



b6 Incorrect reports 

 total = 138 

 average =0.27 



b7 Cutoffs 

 total = 1057 

 average =2. 09 



b8 Double connections 

 total = 1760 

 average =3. 48 



b9 Calls for icrong number 

 total =2520 

 average =4. 98 



cl Deaths from kick of horse 

 total = 122 

 average =0.61 



c2 Number 12 



total =251 

 average =1.00 



c3 Calls from group of two 

 coin-box telephones 

 total = 172 

 average = 1.1 9 



