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
James, W. D.
Building the dairy barn, pp. 64-81 PDF (3.4 MB)
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 78
Based on date of publication, this material is presumed to be in the public domain.| For information on re-use, see http://digital.library.wisc.edu/1711.dl/Copyright