DAIRY HOUSE 319 
cement, two parts clean, coarse sand and four parts 
gravel or crushed stone. Finish with one part cement and 
two parts sand. 
All parts of the floor should slope toward the drain in 
the center. Round out the corners and edges of the floor 
with concrete to make them more easily cleanable. 
The ceiling should be about twelve feet high and built 
of the best ceiling lumber. Keep the ceiling well painted. 
Enough windows must be provided to afford ample 
light and to admit sunshine to all parts of the building. 
Provide ventilation in the milk and wash rooms by 
running tight ventilating shafts from the ceiling through 
the top of the roof. 
Sewerage. Effective sewerage must be provided at 
the time the floor is laid. A bell trap should be placed 
in the center of each room and carefully connected with 
the sewer. Conduct the sewage far enough away to 
keep its odors a safe distance from the dairy house. 
Screening. Where proper sanitation is expected it is 
absolutely necessary to guard against flies, and this can 
easily be done by screening all doors and windows. Flies 
are a prolific source of milk contamination and must 
therefore be rigidly excluded from the dairy. 
