Show favor sodium fluoride to destroy parasites sodium fluoride leoride lu oride ought not be used orr on setting hens just before chicks or boults are hatched hut ched because this chemical does net as a very positive arri taut to tha lungs and breathing apparatus of tile the young birds blue ointment la is a much better agent to use for controlling lice on setting liens lien but for best results it should ho be used a week or ten days before the lien hen is set it la Is possible of course that the breeding birds which produced the t hiir 11 r key isey ego eggs s were a little low in vitality or perhaps they them were t generally yearling males mated to early hatched yearling or two year old hens will give better results than of old toms and old hens F E university of nebraska |