456 071 the Inheritance of Coat-Colour in Cattle 
between grades of kinship, and the apparent variation in intensity of inheritance 
is due to environmental influence, the selective action of breeders, assortative 
mating, and the difficulty of applying a uniform method of reduction to categories 
so varying in their extent and frequency as those we meet with in dealing with 
the records of quantitatively undetermined characters like pigmentation. 
APPENDIX. 
TABLES OF SHORTHORN MATING AND INHERITANCE. 
I. ASSORTATIVE MATING PRODUCED BY BREEDERS' 
SELECTIONS. 
A. Modern Matings. 
Bull. 
R. 
R. L. W. 
R. W. 
Ro. 
W. 
Totals 
R. 
69 
18 
7 
129 
23 
246 
R. L. W. ... 
17 
13 
5 
36 
5 
76 
R. W. ... 
12 
7 
4 
43 
10 
86 
Ro. 
100 
29 
15 
216 
9 
369 
W. 
16 
4 
5 
20 
3 
48 
Totals 
224 
71 
36 
444 
50 
825 
B. Matings of 15 to 20 Years ago. 
Bull. 
o 
R. 
R. L. W. 
R. W. 
Ro. 
W. 
Totals 
R. 
63 
10 
9 
105 
3 
190 
R. L. W. ... 
11 
4 
1 
19 
5 
40 
R. W. ... 
39 
8 
13 
62 
4 
126 
Ro. 
142 
30 
40 
188 
18 
418 
W. 
29 
3 
7 
21 
60 
Totals 
284 
55 
70 
395 
30 
834 
C. Matings of 50 Years ago. 
Bull. 
R. 
R.L.W.* 
R. W. 
Ro. 
W. 
Totals 
R. 
10 
20 
54 
11 
95 
R. L. W. ... 
R. W. ... 
17 
47 
137 
38 
239 
Ro. 
38 
64 
292 
41 
435 
W. 
3 
15 
34 
7 
59 
Totals 
68 
146 
517 
97 
828 
* Formerly recorded under E. W. 
