Raymond Pearl 
247 
In order to bring out in another way the two facts of (a) environmental change 
during the history of the culture, and (b) the differentiation of conjugants from 
non-conjugants I have prepared the following regression tables showing the rela- 
tion between the three characters length, breadth and index. In order to avoid 
too many decimals I have multiplied all the regression coefficients by 10. Apart 
from this the tables are self-explanatory. 
TABLE XI. 
Regression Table. Series A. 
Conjugants. Non-Conjugants. 
Corresponds 
to a probable 
change in 
Unit change of 
10 microns 
in length 
10 microns 
in breadth 
10 7o in 
index 
Length ... 
Breadth . . . 
Index 
10^ 
1-035/n 
- -985 % 
7-483^ 
10;. 
3-145 % 
-17-031;Lt 
7-522/. 
10% 
Corresponds 
to a probable 
change in 
Unit change of 
10 microns 
in length 
10 microns 
iu breadth 
10% 
in index 
Length ... 
Breadth . . . 
Index 
10/x 
2-224/t 
- '289 % 
15-602/. 
10/. 
1-570% 
-11-170/. 
8-647/. 
10% 
Conjugants. 
TABLE XII. 
Regression Table. Series G. 
Non-Conj ugants. 
Corresponds 
to a probable 
change in 
Unit change of 
10 microns 
in length 
10 microns 
in breadth 
107o in 
index 
Length . . . 
Breadth ... 
Index 
10/. 
-537/. 
-1-096% 
7-913/1 
10/1 
4-273 % 
-32-879/1 
8-715/1 
10% 
Corresponds 
to a probable 
change in 
Unit change of 
10 microns 
in length 
10 microns 
in breadth 
10% in 
index 
Length . . . 
Breadth ... 
Index 
10/. 
1-897/1 
- -320% 
19-842/. 
lO/i 
1-495 % 
-23-276/1 
10-402/1 
10% 
TABLE XIII. 
Regression Table. Series E. 
Non-Conjugants. 
Corresponds 
to a probable 
change in 
Unit change of 
10 microns 
in length 
10 microns 
in breadth 
10 7o in 
index 
Length 
Breadth 
Index 
lO/i 
2-147/1 
- -3807, 
21-454/1 
10/t 
1-420 7„ 
-27-994/1 
10-463/1 
10% 
