The Essentials of Poultry Raising 



9i 



attracted by the light and, coming forward, drop down into 

 the nursery tray. 



218. Heat Necessary for Incubation. An incubator thermom- 

 eter must be provided. The bulb of the thermometer should 

 be at the upper level of the eggs. The temperature should be 

 103° F. at all times. If the temperature accidentally goes to 

 105° F. there is danger of killing the germs, and if it goes 



Fig. 32. Incubator with front removed. Egg trays and nursery drawers 

 in place in left-hand side of incubator, and egg trays removed from right- 

 hand side. 



to 110° F. it is probable that all of the germs will be killed. 



219. Leveling and Starting the Incubator. The incubator must 

 be level. Do not put eggs in the incubator till you have it 

 regulated to 103° F. and can hold it through the day and night 

 at that temperature. 



220. Care of the Eggs During Incubation. The eggs must 

 be turned once a day after the third day. Eggs not turned 



