PESTS OF A POULTRY YARD 103 



LICE EGGS ON HEN'S FEATHER. SHOULD BE PULLED OUT AND BURNED. 



How to Keep Poultry Free from Lice 



The following formula is used at the Maine and Cornell Ex- 

 periment Stations : 



Take three parts of gasoline, one part of crude carbolic acid. 

 Mix these together and add gradually, while stirring, enough plas- 

 ter of Paris to take up all the moisture, the liquid and the dry 

 plaster should be thoroughly mixed and stirred, so that the liquid 

 will be uniformly distributed through the mass of plaster. When 

 enough plaster has been added, the resulting mixture should be a 

 dry, pinkish brown powder, having a fairly strong carbolic odor 

 and a rather less pronounced gasoline odor. 



Do not use more plaster, in mixing, than is necessary to blot 

 up the liquid. This powder is to be worked into the feathers of 

 the bird affected with vermin. The bulk of the application should 

 be in the fluff around the vent and under the wings. Its efficiency 

 can be very easily demonstrated by anyone to his own satisfac- 

 tion. Take a bird that is covered with lice and apply the powder 

 in the manner described. After a lapse of about a minute, shake 

 the bird, loosening its feathers with the ringers at the same time, 

 over a clean piece of paper. Dead and dying lice will drop on the 

 paper in great numbers. Anyone who will try this experiment will 

 have no further doubt of the wonderful efficiency and value of this 

 powder. 



For a Spray or Paint 



To be applied to roosting boards, walls and floor of the hen 

 house, the following preparation is used : 



Three parts of kerosene and one part crude carbolic acid. This 

 is stirred up when used and may be applied with any of the hand 

 spray pumps or with a brush. 



In both of these formulas it is highly important that crude car- 

 bolic acid be used, instead of the purified product. Be sure and 

 insist on getting crude carbolic acid. It is a dark brown, dirty 

 looking liquid and its value depends on the fact that it contains 

 tar oil and tar bases in addition to the pure phenol (carbolic acid). 



