VENTILATION 279 



tion shall he smooth, with tight joints, and shall be capable of 

 shedding water. The ceiling shall be of smooth material and 

 dust tight. All horizontal and slanting surfaces which might 

 harbor dust shall be avoided. 



6. Drinking and Feed Troughs. — Drinking troughs or 

 basins shall be drained and cleaned each day, and feed and mix- 

 ing troughs shall be kept in a clean and sanitary condition. 



Fig 91. — Well-finished dairy barn on farm of F. O. Lowden, Oregon, 111. (Courtesy 



Jamea Mfg. Co.) 



7. Stanchions. — Stanchions, when used, shall be con- 

 structed of iron pipes or hardwood, and throat latches shall be 

 provided to prevent the cows from lying down between the 

 time of cleaning and the time of milking. 



8, Ventilation. — The cow stables shall he provided with 



