A SELF-SUPPORTING HOME 



air the machine; then close and proceed to 

 adjust the regulator so that an even tempera- 

 ture of one hundred and two and a half 

 degrees, with the disk one-fourth of an inch 

 above the lamp chimney, is steadily main- 

 tained for twelve hours before setting the 

 eggs. Patience and scrupulous exactness at 

 first will save accident and loss later. 



When the cold trays and eggs are first put 

 in, the temperature will run down, but do 

 not turn up the lamp or alter the regulators. 

 As the eggs gradually become warm, the 

 thermometer will creep up again. After the 

 first day, the trays must be taken out every 

 night and morning, and the eggs turned and 

 allowed to cool to ninety degrees. The time 

 allowed for the process must be regulated 

 by the atmosphere of the room ; if very cold, 

 five minutes may be enough; if moderate, 

 twenty or thirty may be needed. They must 

 not be allowed to chill, but the more airing 

 they get under that point, the stronger the 

 chickens when hatched. 



124 



