CATTLE LICE AXD HOW TO ERADICATE THEM. 



21 



& holding gate in the vat. A holding gate in the vat located at the 

 beginning of the exit incline is necessary only in case animals are to 

 be dipped for scab, or when it is desirable that they be held in the 

 dip longer than the time ordinarily required for passing through 

 the vat. 



DRAINING PENS. 



When cattle emerge from the vat they carry out some of the dip. 

 which runs off their bodies very rapidly. This dip should be saved 



FIG. 12. Cooking and settling tanks for general-purpose cattle-dipping vats. 



arid returned to the vat. not only because it may be used over and 

 over again, but because if it is allowed to drip off in the holding 

 corrals pools of dip collect from which the animals may drink with 

 possibly injurious results, and even if no cattle are poisoned in this 

 way the mud holes which form in the corrals are highly objection- 

 able. Draining pens with water-tight floors sloping toward the vat 

 or draining wells should be provided to catch and return the dip to 

 the vat. The size shown in the plans may be increased or decreased 

 to correspond to the length of the vat. The floors of the pens may 

 be made of lumber or cement and should have settling wells or water 

 traps to prevent rain water from running into the vat and diluting 

 the dip. A design of a settling well is shown in connection with the 



