saucer or plate, after thirty-six hours' incubation. It 

 should be done in a warm room, and in a strong 

 light, when the pulsations of the heart will continue 

 from five to ten minutes, and may be counted. 

 Blood can be seen in the veins, but very faintly. 

 The veins gradually surround the yelk. The chick 

 derives nourishment from the yelk during incuba- 



tion, and what is left of it is drawn into the 

 abdomen just before hatching. 



Fig. 8 represents the interior of the incubating 

 egg on the fifth or sixth day, when the live -germ 

 can be seen with a tester moving up and down and 

 around, and will float to the top when the egg is 

 laid on its side. In testing, the large end of the 

 egg is held up, as in Fig. i, which shows exactly 

 how the egg looks in the tester, through the shell. 

 48 



