J. r. Tocher 
219 
(12) Comparison with other Data. 
I. Scottish Data, (a) East Aberdeenshire Children in 1896. The only data 
of a similar character with which any of the results of the present survey can be 
at all compared are the East Aberdeenshire results of 1896 published in a 
preliminary paper by the author in 1897*. Owing to slightly different I'anges in 
some of the classes however the results are not directly comparable, as printed, 
with the results for East Aberdeenshire in 1903, when the general pigmentation 
survey was carried out. Fortunately in 1896, the teachers were asked not only to 
record the colour with reference to the classes then adopted but also to note where 
possible, and always if in doubt, the probable sub-class from a series of stated sub- 
classes, similar to Broca's scale. Thus the author has been able to retabulate 
where necessary the results of 1896 and, as far as possible, place the children in the 
classes as specified in the analytical tables of the present survey. The first survey, 
it has been found, had a wider range of meditim and a slightly wider range of red. 
With respect to the eye classes, the blue and light-eyed class of 1903 corresponds 
pretty closely to the light-eyed class of 1896. The following table (Table LIX.) 
shows the relative differences in the classes between the two sets of observations. 
To be more specific, the table shows the difference per cent, (or d) in each class 
compared with the probable error of the percentage difference, that is, compared 
with 
V m n 
where in this formula, P = Q = ~ P)f V = observed frequency of the class in 
TABLE LIX. 
Relative Difference between East Aberdeenshire in 
1896 and 1903. {Boys and Girls.) 
Colour 
d 
Hair : 
Fair 
1-77 
Red 
-2-05 
Medium 
-6-79 
Dark 
6-28 
Ei/es : 
Light 
6-29 
Medium 
-1-74 
Dark 
-3-78 
* Tocher; Trans. Buchan Field Club, Vol iv. pp. 1.S7— 152. 
28—2 
