Bul. 186, Bureau of Plant Industry, U. S. Dept. of Agriculture. PLATE Ill. 
Fic. 1.—SIMPLE FORM OF HaiRY-RooT ON FIG. 2.—BROOM-ROOT FORMOF HairRyY-RoOoT 
APPLE SEEDLINGS, TYPICAL OF THOSE ON A 2-YEAR-OLD APPLE TREE. 
USED IN THE EXPERIMENTS. 
FIG. 3.—HEALTHY ROOT-GRAFTED APPLE FiG. 4.—HEALTHY SEEDLING APPLE TREE 
TREE, SHOWING THE TYPE OF THE WITH FIBROUS ROOTS. 
HEALTHY TREES PLANTED IN THE Ex- 
PERIMENTAL ORCHARDS. 
