Karl Pearson 
1 
800 
d 700- 
o 
o 
9 10 11 12 13 14 15 16 17 18 19 
Microns. 
Diagram II. Gaussian fitted to T. pecorum Frequency. 
{h) T. siniiae (see p. 110). 
Mean = 17 "870 microns. S.D. — 1"6558 microns. 
Mierous 
Observed 
Calculated 
Values 
Values 
14 and under 
7 
10'4(i 
15 
28 
27 -63 
16 
76 
63-92 
17 
93 
103-78 
18 
126 
118-32 
19 
92 
94-66 
20 
47 
53-18 
21 
22 
20-96 
22 
6 
5-80 
23 and over 
3 
1-29 
X- = 8-149 
P= -520 
150r 
140- 
Microns. 
Diagram III. Gaussian fitted to T. simiae Frequency. 
Biometrika x 16 
