102 
New Method of Correlation 
This correlation therefore confirms the view already expressed*, that there 
exists very little relationship between psychical characters and head-measurements 
in man. In this case the correlation is zero, considering the probable error which 
must be sensible in the second place of figures. 
Illustration IV. Effect of Enlarged Glands and Tonsils on the Weight of 
Children. The medical inspectors of the London County Council classify the state 
of the glands under two systems, 0 = no enlargement, and + = enlargement, and 
again under 1 good state, and 2 defective, and 3 bad state ; the tonsils are only 
classed under 0 and +. I owe to Mr David Heron the following reductions for a 
typical L.C.C. school. 
Weight 
Glands 
Tonsils 
Totals 
Good 
Bad 
Good 
Bad 
14 
2 
2 
2 
16 
3 
5 
5 
3 
8 
18 
15 
26 
33 
8 
41 
20 
40 
36 
24 
60 
28 
47 
50 
25 
75 
7k 
34 
30 
47 
17 
64 
26 
30 
31 
49 
12 
61 
28 
29 
20 
41 
8 
49 
30 
30 
30 
47 
13 
60 
32 
21 
14 
24 
11 
35 
3k 
18 
11 
22 
7 
29 
36 
18 
5 
15 
8 
23 
38 
6 
7 
10 
3 
13 
ko 
5 
2 
4 
3 
7 
k2 
7 
3 
8 
2 
10 
kk 
1 
1 
1 
k6 
k8 
3 
2 
1 
3 
50 
'1 
1 
1 
52 
1 
1 
1 
1 
1 
1 
2 
Totals 
274 
271 
399 
146 
545 
Mean weight of Boys in school = 27-7522. 
Standard Deviation = 6 7 502. 
Mean weight of those with Bad Glands = 27-3737. 
Mean weight of those with Bad Tonsils = 27-1212. 
For glands : 
^(1- a) = -4972, 1(1+ a) = -5028, ^ = -3988. 
* K. Pearson, "Relation of Intelligence to Size and Shape of the Head," Biometrika, Vol. v. 
pp. 105—146. 
