64 



Table No. XXVII. Weight of Lime in Chick at Differknt Periods of 



Imcubation — Continued. 



60 

 60 



W 



o 

 55 



Name of 

 Incubator. 



Treatment. 



Remarks. 



Prairie State Dry 



11 



1 1 



< 1 



Artifical C0 2 , H 2 used as 

 moisture 



it u 



it (( 



(i «< 



11 11 



it 11 



Disinfected with Zenoleum, 

 H 2 used as moisture 



11 



(i 

 u 



Hen 



it 



As each chick was taken from the shell notes were made on its appar- 

 ent strength. It will be observed that in every case where the chick was 

 marked as "weak" there was a very low absorption of lime, and where 

 it was noted as being unusually strong, there was a large absorption. 

 In this case only decided differences in appearance were noted, but in 

 view of the above result more careful notes will be made in future work. 

 In this connection it may be noted that the lime content of the chicks of 

 the June hatch is lower than that of the July hatch, and Mr. Graham of 

 the Poultry department reports that the chicks of the former month were 

 inferior in vitality. 



It is very probable that there is a vital force in the egg which imparts 

 vitality to the chick. For instance, egg No. 360 in nearly every case 

 produced a chick with a high lime content, and egg No. 40 in every case 

 gave a chick with a low lime content, and three of them were noted as 

 being unusually weak. 



