. 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). 1402 The Cornell Reading-Courses. A temperature higher than 105° and one lower than 103" should be avoided at this time. Both of these undesired extremes will occur at some time during the hatching period unless careful provision is made against them. It would be much better to remove the lamp for a time than to permit the great increase in tem
. 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). 1402 The Cornell Reading-Courses. A temperature higher than 105° and one lower than 103" should be avoided at this time. Both of these undesired extremes will occur at some time during the hatching period unless careful provision is made against them. It would be much better to remove the lamp for a time than to permit the great increase in temperature that usually occurs when the hatch is at its best. Generally, this increase may be overcome by turn- ing 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 ^^^^ "' ~^^\^ 1^ required tem- ? ij perature. •' Fig. 38.— Various positions rr>i , of air cells 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 chickens commence to work their way out of the shells. After the chickens are all hatched and have dropped into the nursery, the heat decreases. There is also more or less condensation of mois- ture from the newly-hatched chick 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 until the chickens are all out. After the hatch is completed the egg trays should be removed, together with any eggshells that may have dropped into the nursery, and the ventilators should be opened full width. If the room is warm the incubator door may be fastened open one half inch at the Please note that these images are extracted from
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