Environmental physiology and shelter engineering with special reference to domestic animals XXI: The effect of humidity on milk production and composition, feed and water consumption, and body weight in cattle
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It is generally agreed that the level of humidity in the air exerts a profound effect on the feeling a of comfort in man, particularly in hot weather and that this humidity effect increases with increasing temperature. Our problem is to determine how this affects cattle at various environmental temperatures particularly above 700 F when the rectal temperature begins to rise. There is no problem of the depressing effect of high humidity on evaporative cooling at low temperatures when the animal does not need to be cooled by vaporization, when there is little skin moisture to vaporize, and when the moisture-holding capacity of the air is insignificant as presently explained.