192 



G. 0. Heslop: 



CO o 

 wo 



11 

 11 



Acute infection 

 Acute infection 

 Acute infection 

 Chronic infection 

 Acute infection 

 Acute infection 

 Acute infection 

 No lesions 

 No lesions 

 Acute infection 

 Chronic infection 

 Chronic infection 

 Acute infection 

 No lesions 

 No lesions 

 No lesions 

 Acute infection 

 No lesions 

 Acute infection 



OS 



o 



o 



00 



o 



1 



t~ 



+^+ 1 ;|;^a: 1 1 ;{; 1 +^ I i i i i + 



o 



+t+"^++- ' 't-++ X 



•o 



+++++++ 1 I++++1 1 1 + 1 J 



■* 



+i+++i+i 1++++ 1 1 1+ 1+ 



CO 



+i+^+i+. 1 ++++ , rr. 1 +.^ + 



<N 



+i+++i+-^ 1 +++i 1 -^..+..+ 



- 



+i+++i++^+++l++++++ 



ll 







•ill 1 



•- o_ o _ 



0-3 E*5 = 



S -c •= o S 

 S_ - &.« 



.~ _ j: V 



= = H*-5 ? 

 .2 g 3 S" 



♦r-iJ O bo 



be br * — o 



11 II II " II 

 + + +«' I 



+ + 



