Moisture
On The Corning Egg Farm moisture is provided in the Cellar by thoroughly wetting the floor with a hose twice a day, the floor sloping gently to a drain in one corner. Large earthen-ware vessels, of about three inches in depth and eighteen inches in diameter, are stood at different points throughout the Cellar, and are constantly kept filled with fresh water. This is done, not so much for the purpose of increasing the humidity of the air, as it is to take up the impurities. As an illustration, if you stand vessels filled with water in a freshly painted room, the odor of paint is almost entirely absorbed by the water.
As even a temperature as possible is carried in the Cellar, and at all times there is a constant flow of fresh air, but it is so controlled that it does not produce a draught. It should be remembered that while a moist cellar is desirable, unless it is well ventilated, it is utterly unfit for the purpose of incubation.