SUMMER CARE AND MANAGEMENT 171 



When the temperature is below 40 the eggs will 

 not hatch. When it is above that they will hatch out 

 in a few -hours or in a week or so, depending upon 

 how warm it is. Freezing or drying soon kills the 

 unhatched eggs. So it is seen that ewes will not 

 pollute a field in winter, their droppings are sure 

 to be soon frozen, at least in the region where sheep 

 are mostly kept. But if the tiny worm hatches from 

 the egg it feeds for a time upon the material of the 

 manure and continues to grow till it is about one- 

 thirtieth of an inch long. Then it creeps up on a 

 blade of grass and waits to be swallowed by some 

 lamb, after which it finishes its growth within the 

 fourth stomach of the lamb, and, incidentally, fin- 

 ishes the lamb as well. 



Under the heading of " Diseases of Sheep" will 

 be found entire the very interesting bulletin of Dr. 

 B. H. Ransom on this subject. 



Now how to manage a flock with safety and profit 

 on natural grass : To begin with, the ewe flock 

 should be treated for stomach worms. This is best 

 done in the fall, when they come from pasture. It 

 may be again done in the spring before their lambs 

 come. Eemedies for treatment will be found under 

 the heading "Diseases of Sheep." The writer is of 

 the opinion that use of some of the coaltar dips, in 

 small doses, much diluted, will eventually be recog- 

 nized as most efficient. This treatment alone has 

 double'd the weight of lambs in some experiments 

 in Kentucky. Next, the flock should at the approach 

 of spring weather be confined to the yard and shed. 



