Show Diet Regulates Color Of Birds' Feathers Br varying the diet or hlrda. Jre-feeaor Jre-feeaor Khrcnrvlch of Berlin ha ueredd In changing tha coloring of thalr ftnre. Certain food will rause red and gren parro'.a to tarn yellow. Hla experlmente tend to ahow ihat a blrd'a plumag dependa largely on the dyeatuffa contained tn food. Dyaetoff put In chli-kan feed affrcte the hue of eag yolk to a eonalderahle desrae. fat' erplllara fad aclulvely on walaut follaae become dark butterfllaa. v I Indiana have long uaderaiood the art of changing tn color of llv. lag birds throuah the diet method. . At -laat America has eome- thing la common with the Slav. Returned traveler reporte that ' RuaBla haa ne bananaa. ftttte- burg itlapatch. . |