I50 The Hen at Work 



the big . end. Then, when the holes are well 

 drilled, he gathers himself together, gives a big 

 push, and is out. 



STunmary of Incubation. — In canying the eggs 

 through the incubation period, observe the follow- 

 ing directions : 



Use eggs carefully selected, not over two weeks 

 old. 



Set up incubator according to manufacturer's 

 directions.^test it carefully at least three days. 

 Also get a druggist to test your thermometer by 

 his standard instrument. 



Be sure that there is proper ventilation in the 

 egg chamber and in the room outside. 



Plan for some supply of moisture in the air if 

 possible; if not, sprinkle eggs, starting about the 

 tenth day. 



Place eggs in the machine at about loi degrees, 

 and keep it so dtiring the first week. 



Ttim the eggs half over at least twice a day for 

 nineteen days. This is best done by arranging 

 them side by side, with space enough left at the 

 edge of the tray so that the last egg may turn half 

 over before striking the guard. It will be seen 

 that if we turn the egg completely around, the yolk 



