24 



FARMERS BULLETIN 713. 



injure the sheep and the wool. After the mixture has been boiled for 

 2 hours the liquid should be of a chocolate or dark-amber color. 



The contents of the boiling tank should be drawn off or dipped 

 out and placed in the settling tank and allowed to stand until all 

 sediment has settled to the bottom and the liquid is clear. The use of 

 some sort of settling tank provided with a bunghole is an absolute 

 necessity, unless the boiler is so arranged that it may be used for 

 both boiling and settling. An ordinary, water-tight barrel Avill an- 

 SAver very well for a settling tank at small vats. All settling tanks 



of every nature should 

 have an outlet at least 

 4 inches from the bot- 

 tom in order that the 

 clear liquid may be 

 drawn off without its 

 becoming mixed with 

 any of the sediment. 

 (See fig. 17.) Draw- 

 ing off the liquid as 

 above indicated has 

 an advantage over 

 dipping it out, for the 

 reason that in the lat- 

 ter case the liquid is 

 stirred more or less 

 and mixed with the 

 sediment. The prime 

 object .is to get the 

 clear liquid without 

 any sediment ; the lat- 

 ter should under no 

 circumstances be al- 

 wool and the eyes of 



Cooking and settling 



the 



loAved in the dipping vat, as it will injure 

 the sheep. 



When fully settled draAv off the clear liquid into the dipping vat 

 and add warm water sufficient to make a total of lOQ gallons of dip. 

 When mixed and cooked as above specified the concentrate is 3^ 

 times the strength required for the dip in the vat, so that to every 

 30 gallons of such concentrate TO gallons of warm water should be 

 added to make a dip of the required .strength. 



In preparing lime-and-sulphur dip in large quantities several hun- 

 dred gallons of concentrate are often made at one time in a single 

 large cooking tank. The amount made at one boiling is limited only 

 by the facilities at hand. If the boiling tank is of sufficient capacity 



