126 PARASITES OF THE DOMESTIC ANIMALS 



not give any better results. If the boiled solution is allowed to settle, the 

 ooze will be equally as safe. 



"B. Sift into the lime paste three times as many pounds of Flowers 

 of sulphur as used of lime, and stir the mixture well. 



"Be sure to weigh both the lime and sulphur. Do not trust to measur- 

 ing them in a bucket or guessing at the weight. 



"C. Place the sulphur-lime paste in a kettle or boiler with about 

 twenty-five to thirty gallons of boiling water, and boil the mixture for 

 two hours at least, stirring the liquid and sediment. The boiling should 

 be continued until the sulphur disappears, or almost disappears, from 

 the surface, the solution is then of a chocolate or liver color. The longer 

 the solution boils the more the sulphur is dissolved, and the less caustic 

 the ooze becomes. Most writers advise boiling from thirty to forty 

 minutes, but the Bureau obtains a much better ooze by boiling from 

 two to three hours, adding water when necessary. 



"D. Pour the mixture and sediment into a tub or barrel placed 

 near the dipping vat and provided with a bung hole about four inches 

 from the bottom, and allow ample time (two to three hours, or more if 

 necessary) to settle. 



"The use of some sort of a settling tank provided with a bung hole 

 is an absolute necessity, unless the boiler is so arranged that it may be 

 used both for boiling and settling. An ordinary kerosene oil barrel 

 will answer very well as a small settling tank. . To insert a spigot about 

 three to four inches from the bottom is an easy matter. Draining off 

 the liquid through a spigot has the great advantage over dipping it out, 

 in that less commotion occurs in the liquid, which therefore remains 

 freer from sediment. 



"E. When fully settled, draw off the clear liquid into the dipping 

 vat and add enough water to make 100 gallons. The sediment in the 

 barrel may then be mixed with water and used as a disinfectant, but 

 under no drcumstances should it be used for dipping purposes." 



There are a number of good proprietary dips upon the market which 

 will l)e found convenient and effectual. No dip should be used, however, 

 unless the ingredients and their exact proportion are known to the user. 

 Secret formulse put out by irresponsible parties should be avoided. 



Dipping Vats. — Where but few sheep are to be treated the dipping 

 arrangements may be quite simple. A tub or trough to which a draining 

 platform is attached will serve the purpose. A small vat, suitable for 

 dipping small flocks, may be constructed of wood or concrete. It should 

 be about nine inches wide at the bottom, four feet deep, and two feet 

 six inches wide at the top. Its length will depend upon the number of 

 sheep to be treated. A convenient length is nine feet at the top, the 

 floor having a length of four feet. From one foot above one end of the 

 floor an incline with cross cleats rises to the top end of the vat. From 



