the skulls and teeth of animals killed at one year and at two years of age were measured from radiographs , and from the results were derived the following conclusions : ( 1 ) pigs fed on protein and on calorie deficient diets all showed considerable retardation of the growth of jaws and teeth , consistently more severe in the calorie deficient than in the protein deficient animals .
C0037303
skulls
C0022359
jaws