. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Fig. 73.— Various positions of air cells than to permit the great increase in temperature that usually occurs when the chicks are coming out of the shell in greatest numbers. Generally, this increase may be overcome by turning down the lamp flame. Very often, toward the end of the hatching period it is necessary to raise the flame in order to keep t
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Fig. 73.— Various positions of air cells than to permit the great increase in temperature that usually occurs when the chicks are coming out of the shell in greatest numbers. Generally, this increase may be overcome by turning down the lamp flame. Very often, toward the end of the hatching period it is necessary to raise the flame in order to keep the required temperature. These two changes in temperature in so short a time will be readily understood when it is remembered that the eggs supply a great amount of animal heat during the last week of incubation, and that this animal heat naturally increases as the chicks commence to work their way out of the sheUs. After the chicks are all hatched, and after they A .>^^*^"—-^^^ have drop- " ped into the nursery, the heat decreases. There is also more or less condensa- tion of moisture from the newly hatched chicks at this time, and this has a tendency to lower the temperature. The position of the ventilators at hatching time depends on the make of the incubator. It is not considered advisable to permit a very great change of air imtil the chicks are all out of the shell. After the hatch is completed, the egg trays should be „ c^- r , ? 1, , JIT . removed, together with any eggshells Fig. 74.—Size of the air cell at different ' ^^ / . , periods of incubation: i day, 7 days, 14 that may have dropped into the days, and 19 days of incubation nursery, and the ventilators shoidd be opened to their full width. If the room is warm, the incubator door may be fastened open one half inch at the top. The chicks should be left in the nursery until the day after the hatch. They should be thirty-six to forty- eight hours old when they are removed to the brooder. A box fo
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