THE MILK SITUATION IN THE DISTRICT OF COLUMBIA. 297 



No. 



Sides of cow stable Continued. points. 



Sides made of wood throughout, rough or open construction, in good 



repair < < 10 



Sides roughly constructed, or of open construction, out of repair, with 



corners that will allow accumulation of filth 



Ceiling of stable: 



Smooth, dust-tight ceiling, in good repair, -made of plaster, smooth 

 metal, or matched boards, and thoroughly insulated above so that 



no moisture will collect on ceiling 20 



Open construction with matched lumber laid, on joist must be dust 



tight and well insulated : -- 10 



Ceiling made of unmatched lumber, smooth or rough boards in 



good repair . 



Ceiling made of rails or litter, including straw or roughage 



Light : 



4 square feet of unobstructed window glass per cow, distributed 



in that part of the stable where the cows stand 50 



3 square feet of unobstructed window glass per cow, distributed as above. 40 

 2 square feet of unobstructed window glass per cow, distributed as abo ve_ 30 

 1 square foot of, unobstructed window glass per cow, distributed as above_ 20 

 6 inches or less than 6 inches of unobstructed window glass per cow_ 

 Cubic feet of space per cow in stable: 



600 to 1,000 cubic feet of space per cow 50 



500 cubic feet of space per cow 40 



400 cubic feet of space per cow 30 



300 cubic feet of space per cow 20 



Less than 300 cubic feet of space per cow 



Ventilation : Two methods of ventilation may be used : First, the flue 

 system ; second, the canvas system : 



Flue system should be constructed in the following manner 

 Exhaust flue 



First. Size, 30 square inches per cow. 



Second. Distribution. Flues may be built one or more In 



number. 



Third. Construction. May be made of wood or other air- 

 tight material that is a good nonconductor. 

 Fourth. Inlet. Must not be more than 18 inches above the 



floor. 

 Fifth. Outlet. Flue must extend through roof and above the 



highest point of the building. 

 Flue should be made as straight as possible, without any 



obstructions, to allow for free circulation of air. 

 Intake or fresh-air flue. If air is taken from the stables through 

 the exhaust flue, arrangements must be made to allow fresh 

 air to come into the stable. This flue should allow 20 square 

 inches per cow. If more than one flue, they should be uni- 

 formly distributed throughout the stable. 



Inlet. Fresh air must be taken from some point below the outlet 

 of this flue in the stable. Flue must not be less than 1 foot 

 perpendicularly. Outlet must be near or in the ceiling of 



the stable 20 



The canvas system consists in placing muslin and wire screens in 

 open or unobstructed air spaces. 



If 3 square feet of muslin is provided per cow, and uniformly 

 distributed from the highest to the lowest convenient point, 

 but not higher than from 2 feet of the floor to within 18 inches 



of the ceiling 20 



If 2 square feet of muslin is provided per cow, and uniformly 

 distributed from the highest to the lowest convenient point, 

 but not higher than 2 feet of the floor to within 18 inches of 



the ceiling 15 



If 1 square foot of muslin is provided per cow, and uniformly 

 distributed from the highest to the lowest convenient point, but 

 not higher than 2 feet of the floor to within 18 inches of 



the ceiling 10 



Ventilation caused by open windows, etc 10 



If no attempt is made to ventilate at all 



