130 Pigmentation Survey of Sehool Children in Scotland 
PIGMENTATION SUEVEY OF SCHOOL CHILDEEN 
IN SCOTLAND^ ' 
By J. F. TOCHER, B.Sc. 
CONTENTS. 
MEMOIR. 
Section 
1. Introductory 
2. 
Arrangements prior to Organiza- 
tion ..... 
Organization and Carrying out of 
the Survey .... 
Problems to be discussed . 
Statistical Methods employed to 
determine Significant Differ- 
ences . . . . . 
Relative Local Difterencos geo- 
graphically considered. Indi- 
vidual Dififercnces in each Class 
Explanatory and Introductory^ 
Differences in Hair Colour: 
(a) Fair Hair ; (/3) Red Hair ; 
(y) Medium Hair ; (8) Dark 
Hair ; (f) Jet Black Hair . 
Diftbrences in Eye Colour : 
(a) Blue Eyes; (/3) Light 
Eyes ; (y) Medium Eyes ; 
(S) Dark Eyes . 
The General Resemblance of Local 
Populations to the General 
Population 
Introductory . 
Hair Colour : (a) Divisions 
O) Counties ; (-y) Districts 
Eye Colour : (o) Divisions 
(/3) Counties ; (y) Districts 
Cliiss Segregation 
I. Interlocal Constants 
I. 
IL 
III 
I. 
IL 
III 
Page 
131 
132 
136 
141 
143 
146 
146 
150 
157 
162 
162 
165 
172 
175 
175 
Section Page 
II. Significance of the Constants . 176 
9. Peculiarities in the Distribution 
of Colour in Scotland . . 179 
General 179 
Red Hair 181 
Relationship between Gaelic 
speaking Population and Pig- 
mentation . . . . 182 
Relationships between Pigment- 
ation, Density of Population, 
and Foreigners . . . 185 
Relationship between Pigment- 
ation and the Death Rate . 187 
The Probable Cause of the 
Association of the Medium 
or Browuhaired Class with 
Density of Population . 188 
Colour Classes wliich are as- 
sociated geographically . 194 
VI 1 1. Relationships between Pig- 
mentation and Physical and 
Mental Defects . . . 197 
Degree of Resemblance between 
the Boy and Girl Population 
in each of the Colour Classes . 198 
The Colour Characteristics of the 
Population of Greater Glasgow 
and Environs .... 200 
Introductory, with Tables of 
classified data . . . 200 
I. 
IL 
IIL 
IV. 
V. 
VL 
VIL 
10 
11. 
An Appendix containing the actual data is issued as a supplement to this volume of Biometrika. 
