22 THE CATTLE FEVER TICK. 



cement, so that it will hold water. Then they fill 

 the vat with water and put the arsenic and other 

 medicines into the water. This makes what is called 

 an "arsenical dipping solution." 



The cattle are driven to the vat and made to swim 

 through the medicine. 



The medicine does not hurt the animal, but kills all 

 the seed ticks, male ticks, and egg-laying ticks that 

 are on it. 



Dipped animals trapping baby licks. 



After the cattle have been dipped they are driven 

 back to their pastures. 



The cattle become traps for the seed ticks in the 

 grass and for the little ticks that will hatch out from 

 the eggs already in the grass. 



The seed ticks in the pasture crawl up on the 

 animals after they have been dipped. In two weeks 

 the animals are given another swim through the 

 medicine. The medicine kills nil the young ticks 



