ENEMIES AND DISEASES 



299. 



a month shut up the house and throw around air- 

 slaked Hme and sulphur. Tobacco dust in the nests- 

 and wallows is also useful. Paint the roosts frequently 

 with a lice killer. A good one can be made of one- 

 half pint carbolic acid, one-half pint bi-sulphuret of 

 carbon and one-half gill pine tar. Shake thoroughly 

 and add slowly to fifteen pints crude petroleum. Keep^ 

 well corked in a jug or can. Shake well before using 

 and apply with a brush to drop boards, roosts, nests 

 and the inside of poultry house shortly before the 

 fowls go to roost. Another good lice killer is made by 

 dissolving in kerosene all the crude naphthalene flakes- 



FIG 118. DEVICES FOR PROTECTING ROOSTS FROM LICE 



it will take up. Moth balls will not answer. Mites- 

 will not venture on roosts that receive a soaking in 

 this fluid every two weeks. The odor of the naphtha- 

 lene sticks to the roosts, and warns vermin away. 

 After two or three applications the roosts will not 

 need treatment oftener than once a month. Sawdust 

 slightly moistened with this liquid is an excellent 

 article to keep vermin from the nests. Vermin proof 

 roosts are also effective and well worth using. Make- 

 the roost of two by three-inch planed joists and set 

 both ends in shallow boxes arranged as shown in 

 Figure 118. One end of each box is partly removed 



