308 



A TICK-RESISTANT CONDITION IN CATTLE. 



appeared during the first fe^\ mouths of 1017. Its first 

 appearance in the followiutj spring Avas on October lOth, 

 1917. The condition continued to be shewn by various 

 <;ow8 at intervals during January, February and March, 

 1918 (see details regarding different cows). On April 

 6th, Mr. Hull reported that no exudate was apparent. 

 On May 2nd he wrote that Baby was shewing heavy exudate, 

 while the same condition, but far less pronounced, was 



it I) It Kf io ii II a tk 2i It i) a t<i » n I i i % ? (> 7 « ci 10 II 



The days on which more or less rain fell, are indicated by a cross 

 on the saturation line. F represents the days on which there was no rain 

 at all. 



visible on Wallum. On June 7th, inspection revealed 

 only one cow — Buttercup — with fresh exudate, but Brownie, 

 Isis and Babj^ shewed evidence of extensive exudation a 

 daj' or two prior to examination. 



