SUMMER CARE AND MANAGEMENT 167 



managed very simply on thick, sweet bluegrass and 

 white clover pastures and without a trace of this 

 malady. The road-side sheep of Ontario graze 

 perennially on the same restricted areas and escape 

 infection. So in northern Michigan, in the Upper 

 Peninsula especially, is a grand field for easy and 

 almost care-free shepherding. Northern Minnesota 



COTSWOLD EWES. 



and Wisconsin should prove little subject to this 

 pest. 



One evidence that cool climates deter the develop- 

 ment of the Haemonchus contortus is seen in north- 

 ern England and in Scotland. On the Cheviot hills 

 flocks grow as thick as the grass will bear and for 

 many centuries this has been so. In Scotland the 

 same is true and the writer in a rather careful study 

 of conditions there saw no evidences whatever of 



