Construction of Stables 153 
the afternoon. This is most desirable during the 
winter months, in order to give as much direct sun- 
light as possible to the stables, because of its effect in 
promoting the general health of the cattle, as well as 
in destroying or retarding the development of bacteria. 
The amount.of window surface in the cow-stable 
should at least be sufficient to provide four square feet 
of clear window surface per cow. If this amount, or 
more, is provided, and the windows are fairly well dis- 
tributed, the stable will be sufficiently well lighted for 
all practical purposes. While some may desire more 
than this, yet, if the building is so situated that the 
windows will admit direct sunlight, the window surface 
stated will be quite sufficient. 
In constructing a stable, it should be made suffi- 
ciently large to give each animal at least 600 cubic 
feet of air space. If a less amount is provided, ‘t 
will be found more difficult to keep the air pure with- 
out causing perceptible drafts of air produced by ven- 
tilation. The ideal ventilation secures a gradual 
change without producing drafts, and yet sufficient to 
maintain the desired degree of freshness. 
The ease with which the stable may be cleaned is 
an important consideration. Not only should it be so 
constructed that it is easy to remove the voidings of 
the animals, but it is necessary to prevent accumula- 
tions of dust in any part of the stable, as well. It is, 
of course, impossible to so construct a practical stable 
that dust will not settle in some places. This, how- 
ever, should be removed frequently, so there shall be 
no accumulation, 
