192 PROFITS IN POULTRY. 
sands, its effects are not lasting, as it soon evaporates. 
To be effectual, it should be applied to the roosts ana 
wood-work ‘frequently, say once a week. 
The red color of some of the lice is due to the blood 
sucked by them from the fowls, as mosquitoes become 
red after dining on human blood. 
