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 
Fic. 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 
