^RANKIN'S =t)150K -BOOK 



of ! the hatch; neither operator 'nor- '■machine is responsible tor 

 them. This is caused by the condition of the mother bird. 



In order to economize *he room thus made by the removal 

 of the fertile- eggs, I run a small- 150-egg machine, in connec- 

 tion with twenty-one of the largest ;«ize, using it, as it were, 

 ■as a tender. - When ^filling one of the ''larger machines, I 'always 

 filled one tray in : the' smaller ©ne .so that when the eggs in the 

 large one were tested, after- the third day/'there was usually 

 eggs enough in 'the small tray to replace those removed as in- 

 fertile, so that the large machines were kept' full during the 

 entire hatch by : the little 'one.* Thus the ; small machine was 

 made to accomplish far more than it would had it run through 

 the hatch. I was thus enabled to have a hatch come-off nearly 

 every day, consequently our eggs were never older than that 

 when introduced into the machine. Always date each day's 

 quota of eggs — keep them by themselves, then there will be no 



Figure 8. — Egg- After 192 Hours. 



mistakes made. I have known parties to keep one general re- 

 ceptacle for their eggs, and when filling their machine take 

 them from the top, while the bottom ones were never dis- 

 turbed, not even turned, and of course soon became worthless 

 for any purpose. 



Figure 8 denotes the appearance of the egg during the 

 eighth day of incubation. If portions of the shell are careful- 

 ly removed at this stage, the rudimentary intestines may be 

 plainly seen, together with the gradual development of the 

 beak and eyes, as well as the trembling of the pulsating 

 arteries through the whole embryo. 



At this stage the operator should mark all doubtful eggs 

 *nd return them to the machine, as he will find plenty of room 



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