467 
1911-12.] On Inheritance of Hair and Eye Colour. 
For comparison of hair and eyes a further selection has been made. 
Only those towns and districts in which ^ 2 is less than unity have been 
analysed, as it is only in those we can expect sufficient freedom of mating 
to allow of the degree of coupling being determined. 
These number twenty-seven in all. An analysis has been made in the 
manner already indicated. The values of a and b have been determined 
from the numbers showing the combinations of hair and light eyes, and 
the values of a + c and b + d similarly from the totals of each colour of hair 
when all eyes are grouped together. The four elements of the population 
are thus found, and a, b, c, d being thus known, the ratio of ad to bo may 
he calculated and the degree of coupling of the eyes and hair known. 
In the adjoining table these values are given. The numbers of persons 
observed and the probable proportions in which the present population is 
derived from the three great races of Europe are given for comparison : — 
Table IV., showing the Constitution of the Population in Different Districts 
in Scotland, with Dr Beddoe’s Reference Numbers. 
No. of 
Persons. 
Teutonic 
Race. 
Alpine 
Race. 
Mediter- 
ranean 
Race. 
£)|PQ 
1 D 
d 
B 
I d 
1 b 
R = — 
n 
X 2 
<1 
15. Beauly, etc. 
170 
47 
32 
21 
7-3 
1-3 
‘7 
•7 
5-6 
<1 
16. Inverness town 
200 
32 
42 
26 
6-5 
1'4 
•9 
1 1-2 
6-2 
< i 
18. ,, district 
500 
38 
39 
23 
7-0 
1'3 
'7 
1*0 
7-7 
<1 
19. Keith, etc. 
200 
36 
40 
24 
6 7 
1T8 
•62 
113 
9-8 
< i 
20b. Forres . 
210 
37 
46 
17 
7-4 
•9 
•9 
•8 
7-3 
C 1 
30. Kirkcaldy, etc. 
300 
44 
39 
17 
7-4 
•9 
•9 
•8 
7-3 
<1 
34. Perth 
665 
42 
36 
22 
7 
1 
•83 
117 
9-8 
<1 
37. Auchterarder . 
180 
43 
33 
24 
6-8 
l'l 
•8 
1-28 
9-9 
2-5 
38. Forteviot . 
300 
42 
35 
23 
6-4 
•8 
1-37 
1-43 1 
8-3 
1-2 
40. Callander. 
150 
37 
37 
26 
7-0 
1'6' 
•4 
i-o 
10-9 
<1 
47. Breadalbane 
199 
41 
30 
29 
o' 5 
1-6 
•69 
1-3 
8-8 
<1 
51. Athol 
290 
39 
39 
22 
7'1 
IT 
*73 
1-07 
95 
<1 
57. Great Glen 
200 
44 
38 
18 
7*5 
1*2 
•66 
•64 
6-0 
<1 
72. Ayr . 
500 
42 
36 
22 
7’2 
1*2 
•69 
•99 
91 
2-3 
73. Maybole . 
250 
39 
41 
20 
7*4 
1 
•67 
•93 
10-3 
<1 
74. Sanquhar. 
200 
36 
41 
23 
9 '7 
1*7 
1-25 
1-76 
7-8 
<1 
76. Upper Galloway 
250 
38 
41 
21 
6'99 
1T7 
•93 
•91 
5-8 
< 
78. Dumfries . 
200 
39 
42 
19 
6 9 
•9 
1-25 
•95 
4-6 
<1 
86. Leith, etc. 
200 
46 
37 
17 
7-8 
•7 
•48 
1*02 
23-3 
< 1 
88. Dunbar 
150 
42 
44 
14 
9 '6 
•9 
•89 
•85 
10-2 
1-2 
89. Midlothian 
300 
54 
32 
14 
7'8 
•8 
•76 
•64 
8*2 
<1 
90. Newhaven 
176 
52 
33 
15 
9-7 
•8 
1-48 
1-32 
10-2 
7 
100. Duns 
230 
48 
42 
10 
7'4 
5 
1 -65 
*45 
41 
<1 
109. Jedburgh . 
150 
44 
39 
17 
8'8 
■6 
1-27 
1*57 
181 
<1 
115. Rulewater, etc. . 
180 
47 
38 
15 
10*1 
•8 
1-32 
1-2 
11*4 
<1 
116. Teviotdale 
272 
44 
40 
16 
7-45 
•7 
1 
•83 
8-8 
<1 
117. Langholm 
200 
44 
42 
14 
7-33 
•61 
1-24 
•82 
7-8 
<1 
It is seen on inspection that in these twenty-seven cases the degree of 
successful fitting when the persons with light eyes are considered is ex- 
ceedingly good. In twenty-two cases ^ 2 is less than unity as against 106 
