12 



tion of the roosting pen is often much worse than where there is no 

 dropping board. 



The majority of houses are lighted by means of a small all-glass 

 window about four feet from the ground, usually in the south side, but 

 not infrequently in the north, east or west. In some instances no light 

 whatever is provided. The question of ventilation is seldom considered. 

 An occasional opening of the door in the winter season is usually re- 

 garded as sufficient to supply the necessary fresh air. In many houses 

 draughfts, especially floor draughts, are particularly bad. Such conditions 

 as these contribute very materially to the propagation of disease. 



Fig. 4. — A good farm poultry house; (a) cotton screen between the windows; 

 (b) runways; (c) frame covered with cotton for windows. 



Note. — By making provision for still more glass and cotton the front of this 

 house could be greatly improved. 



Table No. 6. — Showing Prevalence of Disease on 448 Ontario 



County Farms. 



The Prevalence oe Disease. 



One of the most surprising discoveries made in this investigation was 

 the high percentage of flocks that were more or less affected with disease. 

 It is difficult to estimate with any degree of accuracy the losses suffered 

 .by farmers from this trouble. In some instances flocks were found to 



