344 Anthropo7netry of Scottish Insane 
TABLE XXIV. Correlation. — Hair and Eye Colours luith Lunacy. 
Colour 
r 
E'r 
Red Hair 
- -5824 
3 •TO 
Fair Hair 
- -0244 
•10 
Medium Hair 
- -•1283 
•55 
Dark Hair 
•3396 
rei 
Jet Black Hair 
•0836 
•35 
Light Eyes 
•6952 
5-64 
Blue Eyes 
- •0719 
•30 
Medium Eyes 
- ^3222 
r5i 
Dark Eyes 
-•4815 
2-63 
The results in the above table appear to be important, and confirm the 
deductions made from the pigmentation of the inmates. They show that on an 
average more persons became insane in parts of the country where there is an 
excess of light-eyed persons in the population, and in a much less degree where 
there is an excess of dark -haired persons. Lunacy is distinctly correlated positively 
to light eyes and in a much less degree to dark hair ; and is distinctly correlated 
negatively to red hair and in a lesser degree to dark eyes. Thus there is a greater 
tendency to insanity among light-eyed and dark-haired persons, and a lesser 
tendency to insanity among red-haired and dark-eyed persons, compared in both 
cases with the general population. These are merely statistical facts, and no 
explanation is offered as to how or why presence or absence of pigment comes 
to be associated, as it is here found to be, with insanity. 
(7) Comparison tuith other Data. 
L General. As has already been stated, no general Scottish data exist which 
can be directly compared with the Scottish "general insane" population, since 
a general survey of Scotland has not yet been carried out. Such British returns 
as are available can, however, be contrasted with the data under discussion. The 
following table shows the values of the means of L, B, and 100 BfL. 
TABLE XXV. Comparative Table of L, B, and 100 BjL. 
Population 
Measure- 
ment on 
L (mm) 
B (moi) 
100 1 
Eefereuce 
General Hospital 
Heail 
190^4 
149-3 
78-5 
Bionietrika, Vol. iv. p. 126, Blakeman 
English Criminals 
191 •: 
150-4 
77-2 
Biometrika, Vol. i. p. 204, Macdonell 
Cambridge Graduates ... 
193^5 
154-0 
79-6 
Biometrika, Vol. I. p. 351, Pearson 
Scottish Lunatic Pop. ... 
195^5 
151-5 
77-6 
This Memoir 
Scottish Habitual Crim. 
It 
196^3 
153-1 
78-0 
This Memoir 
British Association 
198^1 
155-5 
78-2 
Phil. Trans. Vol. 196 A. Lee and Pearson 
Naqada Crania 
Cranium 
185-1 
134-9 
73-0 
Biometrika, Vol. i. p. 438, Fawcett 
Biometrika, Vol. iv. p. 354, Schuster 
Long Barrow Skulls ... 
190-6 
I42^5 
74-9 
English Crania 
189-1 
140^7 
74-3 
Biometrika, Vol. in. p. 208, Macdonell 
Scottish Crania 
186-8 
144-3 
77-3 
R. S. E. Vol. 40, Part ni. Sir W. Turner 
