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The height of the palate is represented along the vertical, and the width along the horizontal.

Point A represents the width at the canines and Point B the width at the molars. Each of these points is connected with the point on the vertical representing the height.

The length of the palate is designated by straight lines.

As to measures A, C and D, the differences between the normal and abnormal range from .41 mm. to 1.36 mm., the greatest difference here being in C (female difference):

– 1.36+.74, which may reach 2.48 mm. But this difference is small compared to that of B (height of palate) :

Male +3.09.98, which may reach 4.07 mm.

or

Female +2.86+.63, which may reach 3.49 mm.

We might conclude from this that the probabilities are high that there is a real difference between normal and abnormal individuals only in the case of the height of the palate, and that there is no significant difference in the case of the remaining three measurements.

Now, the question arises at to whether this increased height of the palate in abnormal individuals is a diagnostic symptom of mental defect, i. e., is there a correlation between the height of the palate and mental ability, or is the increased height of the palate in abnormal individuals due to other causes ? For example, the shape and size of the head may materially influence the height of the palate. If a correlation can be shown to exist between the measurements of the head and of the palate, it becomes evident that the increased height of the abnormal palate may be due to conditions other than mental ones.

The following tables (7-14) show the various measurements of the palate, together with the length, breadth and circumference of the head of each individual studied, and the norm for each such measurement, as given in the Stoelting Table of Norms.

TABLE 7.—MEASUREMENTS OF THE PALATE OF NORMAL MALE INDIVIDUALS.

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TABLE 8.-MEASUREMENTS OF THE HEAD OF NORMAL MALE INDIVIDUALS.

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TABLE 9.—MEASUREMENTS OF THE PALATE OF NORMAL FEMALE INDIVIDUALS.

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TABLE 10.- MEASUREMENTS OF THE HEAD OF NORMAL FEMALE INDIVIDUALS.

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19.75 20.75 20.13

20.00 20.26 20.29

16.5 16.9 16.8

17.4 17.5

12.3 13.0 13.I

13.8 14.0 14.1

9.6

17.6

Average

20.21

20.18

16.7

17.5

12.8

14.0

TABLE II.-MEASUREMENTS OF THE PALATE OF ABNORMAL MALE INDIVIDUALS.

Subject.

Age.

Mental Age.

Asymmetry,

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E. S..... F. S... L. C..... A. S..... F. O.... J. H.... P. F.. T. W... J. V..... M. Z.... J. P..., J. L..... H. A..... G. L..... S. R.... J. H.... L. H.... L. R.. M. K. M. B... L. R.. F. S.... F. R... J. L..... I. B..... A. E. F. B. O. K..... Average.

IO II II 12 12 12 12 12 13 14 14 14 15

9.7 8.5 9.5 12 10 14 II.5

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8.5

16

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Height.

Length.

Width at
Canines.

Width at
Molars.

22.75
22.00
17.75

9.50
7.00
5.00
13.00

7.00 II.50 12.00

6.50 II.75 17.00 14.25

24.00 22.00 24.75 29.75 21.25 27.50

6.75

27.00 32.00

29.00 31.00 32.00 27.75 28.50 29.75 34.00 30.00 29.50 27.50 27.75 24.00 25.50 31.00 29.00 30.00 28.00 29.90 29.25 31.50 25.50 34.50 24.50 26.00 31.00 25.25 31.00 28.99

27.00 31.50 25.00 24.00 25.00

31.00 34.50 34.25 32.00 31.00 31.25 38.50 35.00 37.00 33.00 38.00 33.50 32.00 31.00 31.00 29.00 31.00 36.00 42.25 39.00 35.00 35.00 35.50 35.00 29.00 29.75 38.00 33.98

12.50

8.25 II.50 14.00

9.25 15.50

5.50 13.00

7.00 14.75 19.00 17.50 17.25 19.00 10.00 15.00

26.75

29.00

16 16 17 17 17 18

21.00 24.50 23.00 21.00 21.00 21.00 24.60

II.79

TABLE 12.-MEASUREMENTS OF THE HEAD OF ABNORMAL MALE INDIVIDUALS.

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Mental CircumAge. ference.

Norm.

Length.

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20.40 20.45 20.81 20.48 21.50 20.48 19.00

20.48 19.69

20.51 19.75 20.51 21.00

20.61 21.50 20.73 16.56 20.73 20.50

20.82 20.50

20.82 19.50 20.94

17.7 17.6 17.2 17.5 16.7 15.9 16.4 17.9 15.1 15.4 15.9

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16.4

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9.7 8.5

20.25 21.00

20.94 20.94

16.6 16.9

9.5 12 10 14 II.5

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8.5

21.21

15.7

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Norm. Breadth. Norm.

14.2 13.2 13.I 14.5

14.8

17.7
17.9
17.9
17.9
18.0
18.0
18.1
18.2
18.2

14.2 14.2 14.2 14.2 14.3 14.3 14.4 14.4 14.4 14.5 14.5

13.1 14.7 13.5 13.I 15.3 14.2

18.3 18.3 18.3

14.8

14.6

18.3
18.3

13.5
13.7

14.6 14.6

18.7

14.5

14.7

18.7

15.2

14.7

12.5 15+ 17 7.2 18

15.7 21.02 17.0

19.1 19.1 19.1 19.2 19.2 19.2

15.5 13.3 13.9 15.4 15.0 13.8

14.9 14.9 14.9 15.0 15.0 15.0

20.50

18.4

14.2

14.6

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