CERTIFIED MILK 213 



5. The inside surface of the walls and all interior construction shall 

 be 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 troughs and mixing floors 

 shall be kept in a clean and sanitary condition. 



7. Stanchions. Stanchions, when used, shall be constructed of 

 iron pipes or hardwood, and throat latches shall be provided to pre- 

 vent the cows from lying down between the time of cleaning and the 

 time of milking. 



8. Ventilation. The cow stables shall be provided with adequate 

 ventilation either by means of some approved artificial device, or by 

 the substitution of cheesecloth for glass in the windows, each cow to 

 be provided with a minimum of 600 cubic feet of air space. 



9. Windows. A sufficient number of windows shall be installed 

 and so distributed as to provide satisfactory light and a maximum of 

 sunshine, 2 feet square of window area to each 600 cubic feet of air 

 space to represent the minimum. The coverings of such windows 

 shall be kept free from dust and dirt. 



10. Exclusion of flies, etc. All necessary measures should be 

 taken to prevent the entrance of flies and other insects and rats and 

 other vermin into all the buildings. 



11. Exclusion of animals from the herd. No horses, hogs, dogs, 

 or other animals or fowls shall be allowed to come in contact with the 

 certified herd, either in the stables or elsewhere. 



12. Bedding. No dusty or moldy hay or straw, bedding from 

 horse stalls, or other unclean materials shall be used for bedding the 

 cows. Only bedding which is clean, dry, and absorbent may be used, 

 preferably shavings or straw. 



13. Cleaning stable and disposal of manure. Soiled bedding and 

 manure shall be removed at least twice daily, and the floors shall be 

 swept and kept free from refuse. Such cleaning shall be done at least 

 one hour before the milking time. Manure, when removed, shall be 

 drawn to the field or temporarily stored in containers so screened as 

 to exclude flies. Manure shall not be even temporarily stored within 

 300 feet of the barn or dairy building. 



14. Cleaning of cows. Each cow in the herd shall be groomed 

 daily, and no manure, mud, or filth shall be allowed to remain upon her 

 during milking ; for cleaning, a vacuum apparatus is recommended. 



15. Clipping. Long hairs shall be clipped from the udder and 

 flanks of the cow and from the tail above the brush. The hair on the 

 tail shall be cut so that the brush may be well above the ground. 



16. Cleaning of udders. The udders and teats of the cow shall 

 be cleaned before milking; they shall be washed with a cloth and 



