70 



FOR BETTER CROPS IN THE SOUTH 



cotton-seed oil, or crude petroleum may be applied with success. 



2nd. Sometimes the rosin oil emulsions of crude carbolic 

 acid, of about a 5 per cent strength are used. These preparations 

 kill the tick fairly well, but are not very stable, are volatile, and 

 very irritating- if used too strong. 



3rd. Solutions of arsenic are now used with great success. 

 The following is the formula given by the Bureau of Animal 

 Industry: 



ARSENICAL CATTLE DIP. 



(See Bureau An. Ind. Order No. 168) 



Powered White Arsenic 



Sal Soda 



Pine Tar - - 



10 pounds 



25 pounds 



1 gallon 



A dipping vat showing liquid in place ready for use 



Boil the arsenic and sal soda together for at least, fifteen min- 

 utes, or longer, in at least twenty-five gallons of water, until all 

 the arsenic is dissolved. Remove from the fire and cool by adding 

 water to reduce the temperature to 140 degrees F., then add the 

 tar slowly, in a fine stream, stirring vigorously while doing so. 

 Then add water enough to make up the whole 500 gallons. It 

 is now ready for use. 



A Dipping Vat is Very Essential— The arsenic dip may be 

 applied with a spray apparatus, or a large dipping vat may be 

 built, which will permit the treatment of 2,000 head of wild 

 range cattle per day. 



