J. F. Tocher 
TABLE XXX. 
183 
Division 
Gaelic speaking 
Population 
Xi 
Jet Black Hair 
I. N. 
4-82 
-30 
II. NW. 
39-17 
•79 
III. NE. 
- 9-30 
--25 
IV. EM. 
- 8-35 
- -10 
V. WM. 
1-73 
-08 
VI. sw. 
- 8-57 
- -20 
VII. SE. 
- 9-35 
-•38 
VIII. S. 
-10-15 
- -22 
An inspection of this table reveals the fact that in every division where there 
is an excess of the Gaelic speaking population there is an excess of the jet black 
class, and vice versa. The values of the correlation coefficient r and its probable 
error in the particular case when r = 0, or E have been evaluated for all 
the colour classes and the Gaelic speaking population with the following result 
(Table XXXI.). The ratio ?'/^(,.=„) shows how much the correlation found exceeds 
the probable error when r is equal to zero. 
TABLE XXXL 
Correlation of Hair and Eye Colours ivith Gaelic 
speaking population. 
Colour Class 
r 
)• 
Fair Hair 
•3482 
r37 
Red Hair 
- ^3027 
-M9 
Medium Hair ... 
- -8663 
-3^40 
Dark Hair 
•8126 
3^19 
Jet Black Hair ... 
•9581 
3^76 
Blue Eye.s 
•8663 
3^40 
Light Eyes 
-■1248 
-0^49 
Medium Eyes ... 
- ^8760 
-3^44 
Dark Eyes 
- •6387 
-2^51 
This result is of some importance. It shows definitely for the first time the 
general nature of the colour characters of the Gaelic speaking as against the 
non-Gaelic speaking population of Scotland. It proves that the proportion 
of dark-haired and jet black-haired persons is far greater among the Gaelic 
speaking than among the non-Gaelic speaking population. In technical language, 
dark hair and jet black hair are positively correlated to the Gaelic speaking 
population. The association is clear, and the result ought to be of assistance to 
the student of the Keltic race. The above table also shows that blue eyes are 
associated with the Gaelic speaking population, the association being slightly 
