J. F. Tocher 
207 
(3) in several cases the divergencies for the boy and girl populations are unequal. 
When this is the case, the girl population has the greater divergency. 
(/3) Individual Glasses. (1) Hair Colour. Tlie relative local differences have 
in all cases been calculated and show definitely the cause of the divergencies in 
each pigmentation group. It will be recalled that fair hair is in defect in tlie city 
generally. The difference between the city and the general population is very 
great, 12 and 24 times the standard deviation of sampling of the differences for 
boys and girls respectively. There is a distinct fall in the magnitude of the 
difference in taking Glasgow to pieces. Still in no case is fair hair in excess in the 
city. There is only a slight excess in the west suburban group. Tradeston is 
prominent in the magnitude of its negative difference, and resembles the figure for 
Glasgow generally. South Govan and Anderston, also in the heart of the city, 
follow with large differences. Milton and the three suburbs, north, south, and 
east, differ in a moderate degree, while St Rollox, Dennistoun and Bridgeton for 
boys are passable as samples of the general population, such negative differences as 
they show being quite possible in a draw from an evenly distributed population. 
In the girl population, however, only the four suburbs are passable as representative 
of the general population. All the city groups differ widely from the general 
average. In a word, one or two of the northern areas in Glasgow possess the 
average proportion of fair hair and are thus somewhat like the suburbs, but the 
densely populated areas in the city generally are awanting in the proper proportion 
of the fair-haired class. 
There are slight excesses of red hair in Milton, Partick and the north, east, and 
south suburban groups, but in none of the cases are the excesses significant. Thus 
the uniformity of the distribution of this colour class is shown to exist practically 
all over the country, the north-east of Scotland being the exception. No grouping 
occurs to speak of in the densely populated city of Glasgow and no defect in the 
frequency of this class occurs to an extent in the least significant. Town and 
country are thus much alike with regard to this class. 
Medium or brown hair however occurs in quite excessive frequencies in several 
of the city groups, but is less frequent in the suburbs generally. In the west sub- 
urban area. Paisley and Renfrew, the proportion is quite an average one. Tradeston, 
Gorbals and Hutchesontown and $); Calton, Camlachie and Bridgeton (?); 
and South Govan (</ and % ) are the areas of greatest excess of the various shades 
of brown constituting the medium class. Dennistoun and Milton ( % ) are fair 
samples of the general population in this class. In the dark-haired class, Tradeston, 
Gorbals and Hutchesontown again stand out. The greatest excess of this class is 
found over the area of these three divisions. Anderston and the south suburban 
group for boys show perhaps significant excess, but the differences in the other 
groups although positive are not significant. In the suburbs generally there are 
less dark-haired children proportionally than in the heart of the city, and the 
northern portion of the city itself has a less proportion than the southern and 
eastern portion. With regard to the small class of jet black haired persons, 
