82 CLEAN MILK 



and about eight inches deep. The trench should have a fall for 

 drainage, being, for instance, six inches deep at one end and ten 

 inches deep at the other; or the whole floor of the stable may be 

 made to slope, with the trench of the same depth from end to end. 



Special milking barns (used only for milking) are not at all 

 .necessary to produce clean milk, since bacteria are as few in milk 

 withdrawn in ordinary clean barns as in milk withdrawn in barns 

 used only for milking purposes. 



Stables should be cleaned by daily scrubbing with a washing 

 compound followed by the use of the hose. 



A number greater than forty cows is not desirable in one 

 barn. There should be a continuous window space along each 

 side of the barn. The windows may hinge from below, or be made 

 to open and close as one, by means of a continuous rod. In cold 

 climates, the sides of the barn may be built of two layers of inch, 

 matched boards with a space of eight inches between, filled in with 

 cut straw or sawdust. Besides this, building paper should be laid 

 inside each layer of the boarding. The inner layer of boarding 

 should be without beading and laid perpendicularly. The ceiling 

 overhead should be perfectly tight. If it is composed of a double 

 floor with building paper between, there is no reason why hay 

 should not be kept overhead, providing it is brought down into a 

 room separate from the main stable. There should be tightly-fitting 

 double windows in winter in cold climates. The King ventilating 

 system consists of numerous flues on all four sides of the building 

 for the intake of air, 4x4 inches in diameter, and opening three 

 or four feet below the ceiling outside the stable, and entering the 

 stable just under the ceiling. These are furnished with sliding 

 doors, or closed with an arrangement like a furnace register in a 

 dwelling house. The out-take for air should be only one for every 

 twenty cows or less, being a shaft with openings — the same size 

 as the shaft one foot above the floor and just below the ceiling. 

 This shaft should be placed on the outside of the centre of one side 



