10 



FARMERS BULLETIN 909. 



5), which, equipped with hose and nozzles, can be purchased for less 

 than $10, is convenient for the purpose. 



Any of the dips recommended for lice may be applied in the form 

 of a spray., and while spraying is usually not as effective as dipping, 

 nevertheless, if the work is done w r ell and carefully the lice can be 

 eradicated by spraying. Two treatments should be given 15 to 16 

 days apart. At each spraying it is important that every portion of 

 the surface of the body receive the maximum possible wetting, spe- 

 cial attention being given to the head, ears, brisket, tail, and inner 

 surfaces of the elbows, flanks, and thighs. (Fig. 6.) 



FIG. 6. Treatment for lice by means of a spray pump. 



When arsenical dip is used care should be taken to see that neither 

 the animal nor the operator breathes the spray. The operator should 

 also be careful not to get his clothing wet with the dip. 



DIPPING. 



Dipping consists in immersing animals in a medicated liquid that 

 will kill the lice. It is the most successful known method of apply- 

 ing treatment for lice. Dipping plants are usually arranged so that 

 the cattle enter one end of a vat filled with dip, through which they 

 swim, and leave the vat at the opposite end (see illustration on 

 front page). 



