l86 MAINE AGRICULTURAL EXPERIMENT STATION. 1907. 



The most unsatisfactory feature of this experience was, that 

 the treatment did not kill the lice or materially lessen their 

 numbers. It was only, when later, the birds were individually 

 treated with the tobacco dust and insect powder, worked in 

 among the feathers, that the lice were nearly exterminated. 



The insides of the buildings are treated with these liquid 

 preparations in warm weather, so that the woodwork may be 

 obnoxious to the lice and prevent their lodging there. For this 

 purpose they are satisfactory, but our experience with them 

 shows plainly that any material, with odors sufficiently strong 

 to penetrate the feathers and kill the lice on the bodies of live 

 hens, will prove destructive to the hens themselves. 



