Bui. 561 , U. S. Dept. of Agriculture. 
Plate II. 
Fig. 1.— Pen 6, Mixed Pen of General-Purpose Breeds. 
On free range; fed a scratch mixture containing barley, and had beef scrap separate from the mash. 
Fig. 2.— Pen 7, White Leghorns. 
Confined to yard; allowed to select their own mash. 
