SANITATION 323 



creolin (2 parts creolin to 100 parts water) makes a good dip 

 for lice. Coal oil is very effective, but is apt to blister, and 

 should be applied lightly. Crude petroleum is also recom- 

 mended by some ; it is inexpensive, does not blister, and is more 

 lasting in its effects than some patent preparations. (Fig. 87.) 

 In applying a dip, care must be taken to wet thoroughly 





FIG. 87. Type of hog oiler to destroy vermin. When the hog rubs against, one of the 

 upright bars, oil is conveyed down the bar and oils the itchy spot. 



all parts of the animal's body. Lice are commonly found on 

 the inside of the legs, about the ears, or in the folds of the 

 skin on any parts of the body, and unless the application of 

 dip is thoroughly made, many of them will escape. Dipping is 

 one of the most effective methods, and, when large numbers 

 are to be treated, it is necessary to have a special dipping vat 

 through which the hogs are compelled to swim. The dip may 



