A SELF-SUPPORTING HOME 



The eggs should be tested on the seventh 

 and fifteenth days. This is best done by a 

 block-tin device sold by all incubator com- 

 panies. 



Infertile eggs appear quite clear when 

 placed before the spot through which the 

 light shines. They can be used, when boiled 

 hard, to feed the 

 young chicks when 

 they arrive. 



Weak or dead 

 germs are difficult 

 for the amateur to 

 distinguish, so sac- 

 rifice two or three 

 that look pale and 

 undeveloped in contrast to strong, unmistak- 

 ably vigorous ones. Break the doubtful ones 

 into a saucer and study closely. If there 

 are many you are doubtful about, mark 

 them with a pencil and test again on the 

 tenth or twelfth day. When an egg con- 

 taining a strong germ is held up to the 



125 



