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Wisconsin Dairymen's Association / Fortieth annual report of the Wisconsin Dairymen's Association : held at Beloit, Wis., November, 1911. Report of the proceedings, annual address of the president, and interesting essays and discussions relating to the dairy interests
(1912)

James, W. D.
Building the dairy barn,   pp. 64-81 PDF (3.4 MB)


Page 78


Fortieth Annual Report of the
Mr. James: That has not been our experience. You appreciate
that we continue those intake flues to the center of the barn. And
we know from experience that we can bring the air to the center in
that way.
Judge Rosa: I have the utmost respect for Mr. Goodrich, and the
first slip I have known him to make since he has been here was when
he talked about the air being sucked up. In every ventilating system
like this there is no such thing as the air being sueked up-the air
is pushed out, you want to bear that in mind. The warm air goes
out of the barn only as it is forced by the cold air, the same as it will
go out of a tin can if you pour water into it. As you pour the cold
air into the barn you force the warm air out, and that is the only way
it is forced out. I think that as the cold air comes in it would have a
tendency to get warmed up considerably, instead of dropping to the
floor it would probably take a shoot out toward the end of the barn,
from these little intakes, and the reason for that is this, that it is
pure air that comes in. We know that impure air contains carbon
dioxide and is much heavier than pure air, and I would be much
afraid of the impure air although possibly it may be a little warmer
than the air coming in, and would just over-balance it in weight. I
would want to see this work before I built a barn that way.
Mr. James: I want to assure all the dairymen here to-day that that
system is working. Last year there were two hundred and some
barns built this way and this year three hundred and thirty-not all
of them built this way, but in the majority of barns the cattle face
to the center. We advocated that plan and it works very successfully.
Mr. Glover: There is a four-row barn in the Elgin district where
two rows of cattle face -each other and the air is brought in exactly
the same as the air is taken into that two-row barn, and it does diffuse
very well. Now, in reference to carbon dioxide being heavier than
air. That is true, and in a room where there are no currents it would
settle to the floor, but every animal Is a living thing, she throws off
heat, she breaths, and in doing this she sets up motion in the air and
it is all mixed together. The theory held by Professor King is a good
one, and I don't wish to question his statement that the Impure and
cold air is at the bottom, but the United States Department of Agri-
culture has conducted over five hundred experiments, measuring the
temperature of the barn with instruments, analysing the air to de-
termine the amount of carbon-dioxide gas taken from different parts
of the barn, and they find that there is as much carbon-dioxide gas
at the ceiling as at the floor, amd they account for it in this way:
the animal is constantly mixing the air, making it all the same com-
position, whether it is found at the ceiling or on the floor. I feel
I
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