PLATE 5 



EXPLANATION OF FIGURES 



21 to 26, obj. 16, oc. 6, table level. 



21 Frontal section through the anterior part of the brain of a soldier. 



22 Frontal section through the central part of the brain of a soldier. 



23 Frontal section through the posterior part of the brain of a soldier. 



24 Frontal section through the anterior part of the brain of a worker. 



25 Frontal section through the central part of the brain of a worker. 



26 Frontal section through the posterior part of the brain of a worker. 



