APPENDIX. 279 



space between the edge of the suture of the frontal bone and the edge of the 

 squamous suture of the temporal bone, where these two approach nearest to each 

 other, on the plane of the superciliary ridge. On examining a number of open 

 skulls, I find that a line run directly across the skull from the point A on one side, 

 to the corresponding point on the other, on the same level with the superciliary 

 ridges, coincides closely with the transverse posterior margin of the super-orbitar 

 plates. If a perpendicular line be dropped from the point A, when the axis of 

 the eye is parallel to the plane of the horizon, it will be found to coincide closely 

 with the most projecting point of the zygomatic arch ; and as this part of the 

 zygomatic arch can be felt in the living head, it affords a means of appreciating 

 the length of the anterior lobe in living persons. The masks of Napoleon and 

 Canova show very long anterior lobes when measured according to this rule. 



The height of the anterior lobe, so far as it manifests the intellectual faculties, 

 may be estimated by a line drawn from B on the superciliary ridge, to a point 

 about a quarter of an inch above the centre of ossification of the frontal bone D, 

 Plate LXXI. The point of ossification, D, of the frontal bone corresponds to the 

 centre of the organ of causality on each side. 



The space included in D, A, B, denotes the dimensions of the anterior lobe 

 devoted to intellect in the Swiss skull. 



The size of the organs devoted to the moral sentiments may be estimated as 

 follows. These organs lie in the coronal region of the head ; and when the axis 

 of the eye is parallel with the plane of the horizon, a horizontal line stretched 

 across the forehead at the superior edges of the organs of causality and drawn 

 backward till it touch the superior edges of the organs of cautiousness, would 

 leave all the moral organs above it, and the organs of the propensities common to 

 man and the lower animals, below or behind it. The centre of ossification of 

 each parietal bone, C, is the centre of the organ of cautiousness. 



I have drawn a line from the centre of ossification in the frontal bone, D, to 

 the centre of ossification in the parietal bone, C, (the centres of causality and 

 cautiousness respectively,) on the Swiss skull, and assume all the region above this 

 line, or the space included in E, C, D, to manifest the moral sentiments. 



The space El, C, F, denotes the seat of the organs of self-esteem, love of 

 approbation, and cautiousness, C being in the centre of cautiousness. These three 

 sentiments are common to man with the lower animals. Self-esteem and love of 

 approbation, take their direction from the predominant faculties with which they 

 are combined in the individual. If we find them combined with a high coronal 

 region, they will assist the moral sentiments. If they be combined with the 



