30 
N. C. Agricultural Experiment Station 
Fig. 10. 
Hen No. 
Hen No. 
Hen No. 
Hen No. 
Hen No. 
Hen No. 
Amount of Grit Remaining in the Gizzards of 
Each Period. 
7, killed 36th day. 
8, killed 36th day. 
9, killed 42d day. 
10, killed 79th day. 
11, killed 93d day. 
12, killed 120th day. 
Wt. gizzard, 19.00 gms. 
Wt. gizzard, 7.10 gms. 
Wt. gizzard, 14.13 gms. 
Wt. gizzard, 20.76 gms. 
Wt. gizzard, 15.43 gms. 
Wt. gizzard, 9.63 gms. 
Hens at the End of 
Wt. grit, 16.43 gms. 
Wt. grit, 5.03 gms. 
Wt. grit, 8.46 gms. 
Wt. grit, 6.37 gms. 
Wt. grit, 11.63 gms. 
Wt. grit, 4.96 gms. 
