( 6 ) 



As the strong and vigorous chick is usually fatter than the weak 

 one, we might look for more rapid absorption of the fat of the yolk 

 by the strong chick than by the weak one. By reference to the fore- 

 going table, it will be seen that the percentage of fat in the yolk of 

 the weak chick is in some cases less and sometimes more than in the 

 yolk of the strong chick. 



PHOSPHORUS IN THE CHICK 



There is a difference of opinion as to whether the inorganic phos- 

 phates are useful in the building up of organic phosphorus compounds 

 in the animal body. It is has been shown by E. B. Forbes l that bone 

 meal fed to pigs had the effect of strengthening the Upnes. The same 

 author 2 says that the principal need of phosph'ori!rs by the body is 

 phosphorus in the form of inorganic phosphates, and that organic 

 phosphates can supply the bodily need for phosphorus, both organic 

 and inorganic, provided the necessary bases are present. 



The theory is advanced by some investigators that phosphorus 

 compounds lend vigor to the young animal and that the weak animal 

 is not obtaining sufficient phosphorized elements. 



The chicks, after removal of the yolk, were examined for the con- 

 tent of phosphorus with the following results : 



1 Bulletin 81, Missouri Agricultural Experiment Station. 



2 Bulletin 201, Ohio Experiment Station. 



Phosphorus in the Chick 



Number Age Weight Grams of Per Cent Per Cent 



of of of Race P 0. P, K P, K in 



Chick Chick Chick in Chick in Chick Dry Matter 



2872 1 day 33.41 Strong .2085 .624 2.93 



2892 2 days 31.85 Weak .2135 .670 3.17 



487 2 days 31.57 Weak .2253 .713 2.78 



498 2 days 31.26 Weak .2207 .706 2.81 

 511 2 days 32.87 Strong .2468 .750 3.10 



M 2 days 32.80 Strong .2432 .741 2.82 



N 2 days 32.64 Strong .2272 .696 2.63 



O 2 days 32.06 Strong .2080 .648 2.57 



499 3 days 35.59 Weak .2618 .735 2.11 

 503 3 days 38.92 Strong .3158 .811 2.65 

 507 3 days 42.15 Strong .3000 .711 2.46 



It will be seen that the weak chick is equally as rich in phosphorus 

 as the strong chick. The chicks are designated "weak" and "strong," 



according to their ancestry. There is, of course, a possibility of the 

 offspring of weak parents being strong and vice versa, so conclusive 

 proof is not here shown. 



Number of Number of Eggs Date Laid 



Hen in Sample 



3486-29 5 July 714 



3609-29 5 July 714 



3486-29 6 July 2126 



3486-29 4 July 2227 



