FARM SANITATION 223 



schools are consolidated in one large central build- 

 ing the fan system to drive the air in and out is 

 the best in use. There are now excellent ways of 

 heating and ventilating one-room schools without 

 opening windows, and no country schoolhouse can 

 afford to be without such a moderate priced bless- 

 ing. (Fig. 108.) The illustration sliows a heating 

 and ventilating system where the fresh outside air 

 passes in near the furnace and is warmed. It then 

 circulates as the arrows indicate. The cold, foul 

 air near the floor is drawn out by the opening into 

 a separate chimney flue at the floor level. The best 

 way to prevent and to fight tuberculosis, either 

 among cows or human beings, is with plenty of 

 good, fresh fair. Keeping the house and the barn 

 supplied with plenty of fresh air and sunlight is the 

 greatest safeguard to health. 



School Lighting. The only perfect way of light- 

 ing a schoolroom is from the top, which is nature's 

 l)lan. (Fig. 109.) The children's eyes should be 

 protected from the strong light from side windows, 

 because the eye, like a camera, can adjust itself to 

 but one intensity of light at a time. The strong 

 glaring windows cause the pupil of the eye to close 

 so much as to make all objects in the room look dim 

 and the eyes are strained, trying to see clearly. 

 The only way to secure a well-distributed, even 

 light is from skylights, and country schools, being 

 of one story, can easily be provided with them, and 

 the protection to the children 's eyes justifies the cost. 



