14 



MISC. PUBLICATION 2, U. S. DEPT. OF AGRICULTURE 



To malvo a vat, the jK'ople first dij; a deep, lon^ trench. They 

 line this trench with concrete and cement, so tiiat it will hold water. 

 Then they till the vat with water and jMit the arsenic and other 

 nitHlicines' into the water. This makes wliat is called an "arsenical 

 dippin<j^ solution." 



The cattle are driven to the vat and made to swim throu<;h the 

 medicine. 



The medicine does not hurt the animal, but kills all the seed ticks, 

 male ticks, and e^^udayin*; ticks that are on it. 



After tiie cattle have been dipped they are driven back to their 

 pastures. 



The cattle become traps for the seed ticks in tiie jrrass and for the 

 little ticks that will hatch out from the e<j:^'s 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 ar(> iiiven another swim 



l)ip|)itl aiiinuils trapping; baby ticks 



tlirough the medicine. The medicine kills all the young ticks that 

 are on the cattle. The ticks are killed before they have had a chance 

 to make any eggs or suck nuich blood. 



Then the animals go back to jiasture again and trap still more 

 seed ticks. After the animals have been dipped in the medicine 

 every two weeks all spring and sunmier there will be no more ticks 

 to lay eggs. There will be no more eggs left to hatch out a fresh 

 crop of seed ticks. All the ticks that have been trapped by the 

 cattle have l)een killed by dii)ping. All the little seed ticks that 

 ditl not get on to the cattle have starved to death. 



EVERY AMM.\L MUST BE DIPPED 



AVhere the people of a <<)uiity >cc that every cow, calf, steer, horse, 

 muh'. and colt is dipped rcguhuly during the spring and summer, 



