DIPPING 



331 



the exudation and drying of a lymph-like liquid, which gathers 

 in minute sacs or pustules in the skin, as the result of the activities 

 of the mites. 



Dipping after shearing, and keeping the animals for at least 

 four weeks away from their old quarters, will tend to prevent 

 reinfestation. Two dippings, with an interval of from six to ten 

 days between treatments, are necessary; in severe cases even three 

 dippings are advised. Various dips are in use. Those containing 

 arsenic are not recommended, on account of their poisonous nature. 

 The dips containing tobacco, and the lime-sulfur-dip, are excellent. 



FIG. 332. Scab-mite of sheep, male on left, female on right. Much enlarged; o, head; 

 b, b, legs; c, c, suckers. (After Curtice.) 



The United States Department of Agriculture has, in the past, 

 recommended the following dip for scab: 20 pounds of lime, 

 25 pounds of powdered sulfur, 100 gallons of water. Slake the 

 lime, and add the rest of the water and the sulfur; boil twenty 

 minutes and strain. This is said by some to be too severe both 

 on wool and skin. The coal-tar dips, used in accordance with the 

 directions given by the manufacturers, are advised. Each sheep 

 should be held in this solution until the scabs are thoroughly 

 soaked, possibly two minutes for each sheep, immersing the head 

 at least once. Give a second dipping ten days later and possibly 

 a third after an equal interval. The temperature of the dip should 

 be 103 degrees F. Dip suspected sheep, which have been purchased, 



