138 PRINCIPLES AND PRACTICE OF MILK HYGIENE 
the ceiling should not be over 10 feet high; for 30 cows, 
not over 12 to 15 feet; more than 30 cows, not over 16 
feet (Rievel). The length and width of the stable should 
be such as will provide sufficient floor space to accom- 
modate the cows comfortably and to make it convenient 
to milk and care for them. When the cows stand facing 
the centre of the stable, the alley or passageway in back 
of them should be of sufficient width to permit the passage 
of a man carrying a pail of milk without the pail touch- 
ing or coming too near the cows. To meet this require- 
ment it is necessary for the passageway to be at least 
3 feet wide, the milk pail being carried on the side of the 
milker farthest from the cow, but a width of 5 or 6 feet 
is much better. A narrow passageway back of the cows 
makes it difficult to keep the wall clean. The passageway 
between two rows of cows standing tail to tail should be 
at least 8 feet wide; it can hardly be wide enough to 
prevent milk carried in a pail between the cows from be- 
ing contaminated by the dust dislodged by the switching 
of the tails. There is also danger of contamination from 
splashing urine and manure. 
To provide 500 to 600 cubic feet of air space per cow 
the floor space, with a 9-foot ceiling, may be distributed 
as follows: 
Feed alley ........... 4 feet 
Manger ....... 14 to 2 feet 
Platform..... 414 to 51% feet 
Gutter a .ccia wes aioe eu 16 inches 
Alley in rear of cows 5 to 6 feet 
The total of these dimensions would be 18 feet. Al- 
lowing 312 feet for the width of the stall, there would be 
63 square feet of floor space for each cow, which, with a 
