MEDICINES, DISINFECTANTS, AND INSECTICIDES 127 



of domestic fowls. It may first be tried, one half diluted 

 with olive oil. If failing in its object when thus ad- 

 ministered, it may be given pure. The dose of turpentine 

 is from one to three teaspoonfuls. Fortunately, worms 

 in fowls are not very common, although most poultry- 

 men have them to contend with at some time, if they 

 keep fowls through many years, .and especially if many 

 are brought in from outside. One who buys eggs is a 

 little safer from such troubles. If worms appear, the 

 safest and quickest treatment is to destroy all affected 

 fowls, and to disinfect the runs thoroughly. 



It is, as a rule, useless to treat any difficulty with the 

 egg organs, unless it may be those which come from 

 abnormal laying, or from the attentions of the male. 

 External swellings at the vent, mild discharges, and pro- 

 trusions may be treated with disinfectant oils. Any of 

 the tar products are good, or the petroleum residues. 

 When I chance to have zenoleum on hand, I use that, 

 and find it very good. Any of this class, related to car- 

 bolic acid, or phenol, is likely to be good and effective, 

 wherever a disinfectant is needed. Internally, or on 

 raw surfaces, they must be well diluted, as noted above. 

 A further word on these will come in when we consider 

 insecticides. 



In treating diseases of the head and throat, the story 

 of disinfectant treatment is repeated once more. The 

 liquid roup cures and the washes that are used are com- 

 monly muriatic tincture of iron, permanganate of potash, 

 or dissolved copper sulphate or peroxide of hydrogen. 

 The last two excoriate harshly, and the fowls struggle 

 and suffer much. Dilute peroxide to one half is 

 better. I have found tincture of iron most satisfactory, 



