310 SUMMER MANAGEMENT 



time to replace that lost by evaporation. The boiling causes the 

 lime to combine with the sulfur, making calcium sulfide, which is 

 the active agent in the dip that kills the mite. This mixture, a 

 chocolate-colored mass, is then transferred to a barrel and allowed 

 to settle for several hours, after which the clear solution is dipped 

 from the top of the barrel or else drawn from it by making a hole in 

 the side about three or four inches*from the bottom. The sediment 

 is largely uncombined lime and sulfur, and if stirred up into the 

 clear solution will injure the wool. Enough water should be added 

 to the clear solution to make 100 gallons. The water added should 

 be hot enough so that the temperature of the preparation in the vat, 

 after being well mixed, will register from 100 to 105 degrees F. 



Kentucky Station Bulletin 143 gives the following comment on 

 lime-sulfur dip: 



" This well-known dip is very effective in the treatment of sheep 

 scab. It is also one of the cheapest of dips. It does, on the whole, 

 a slight damage to the wool, even if properly prepared more 

 noticeable in fine than in coarse wools. It is caustic to the oper- 

 ator's hands. Some dealers object to it because it gives the wool 

 a washed appearance, consequently the sheep do not look in as good 

 condition for immediate market as where some other dip is used. 



" The U. S. Bureau of Animal Industry has reached the con- 

 clusion that it has but little effect in destroying the sheep tick, hence 

 should not be used if the sheep are afflicted with both scab-mite and 

 tick. However, with these objections to the lime-sulfur dip, a few 

 of the large sheepmen in this state use it when their sehep have 

 become badly affected with the scab mite." 



Tobacco dips are effective remedies for scab and they are said to 

 be non-injurious to the wool. The active agent in them which kills 

 the scab mite is nicotine. These dips also kill sheep lice and ticks, 

 and, therefore, can be made use of as general dips. 



Various arsenical dips have been prepared, but as home-made 

 decoctions prepared by a formula little use has been made of them. 

 If the writer mistakes not the famous proprietary dip manufactured 

 by William Cooper and Nephews is regarded as an arsenical dip. 



The various coal-tar dips are among the most pleasant to use. 

 They are easy to prepare; they are healing and disinfecting, and 

 they leave the skin in healthy condition. Many of the manufactured 

 or proprietary dips contain coal-tar products. 



Manufactured Dips. Various prescriptions are available for 



