2J 



Figure 3. Comparison of Percentage of Poultry Population Tested 

 with the Percentage of Population in Non-reacting Flocks. 



MA vSvS/3 C/iU>5ETT^ 



BAf^N3TA3Lf: CO. 



3/?l3TQL CO. 



r/fAA/KUA/ CO. 

 /YAMFD^A/ CO. 



NAMF^HIffL CO. 



MIDDLL-5LX CO. 



JVOFrOLK CO. 

 PLYMOUTH CO. 



W0RCC3TfJf CO. 



^: 



\/='£R CENT or f>OULrf?Y POPULA- 

 T/O/V //V A/OV-PEACTyNG- FLOCKS. 

 P£/f CENT or POULTRY 

 P04=UI.ATI0f^ TESTED. 



