If banked on one side of the barn, Cut C, page 62, shows how fresh air is
introduced. The air flue is made the same as on the other side of the barn,
but on the outside has its end connected as represented on the left of the cut,



s!m?n



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<SS* JAOQSS T3JAY 77



with a length of 6- or 8-inch sewer pipe, with its top covered with a cap or
coarse wire screen. Drain tile would not answer for the outside exposure at
the surface of the ground, as frost would cause it to crumble. Wood could be
used, and replaced after rotting had occurred.
These openings should be placed on both sides of the stable, if possible,
in order to take advantage of the wind pressure that increases the draft. It is
better to have many small openings than a few large ones, because the cold air
is better distributed, lessening drafts. All intake flues should be equipped
with registers, so the air is at all times in control of the party in charge. Intake
flues may be made of galvanized sheets or wood.
Intake flues should be insulated with a dead air space of one inch, as
shown on page 62. Unless so insulated, the cold air flowing through the intake
flue will condense the moisture of the warmer air of the barn, and the wall
and ceiling along the intake flue will be covered with moisture or frost.
H. C. Prange of Sheboygan, Wis., writes: "Replying to your favor of Nov. 15th beg to say, yes,
your plans were more than complete. The builder could follow them easily.
