Oct. 22, I917 Indirect Effects of Selections in Breeding Indian Corn 113 
Table II .—Type and variability of the four chemical-composition strains of Indian corn 
for 11 crops , IQ05 to IQ15 —Continued. 
crop oP 1914 
Character and strain. 
Mean. 
Em¬ 
pirical 
mode. 
Standard devia¬ 
tion. 
Coefficient of vari¬ 
ability. 
Length of ear, in inches: 
High-protein... 
7. 245 °33 
7-5 
1. 279^0. 024 
17- 6S ±o -33 
Low-protein... 
8. 037± .041 
8.5 
1. 36S± .029 
17. 02± .37 
High-oil. 
6. 423± .035 
6. 5 
1. 248± .025 
19. 43 ± -40 
Low-oil. 
6.983 d: .032 
7-5 
1. 200± . 022 
17. i8± . 33 
Circumference of ear, in 
inches: 
High-protein. 
5-2871b .012 
5 * 3 
. 441d= . 008 
8. 34 ± . 17 
Low-protein. 
5 * 9 i 8 db .014 
6. 0 
. 474 ± .010 
8. 01 ± . 17 
High-oil. 
5. 282 d= .013 
S* 5 
. 4661b . 009 
8. 82 ± . 18 
Low-oil. 
6.162 ± . 015 
6.5 
. 544± . 010 
8.83d: . 17 
Weight of ear, in ounces: 
High-protein. 
6. 396 ± .044 
6. 0 
1. 499 ± .031 
23 - 44 ± - Si 
Low-protein. 
8 . 2841b • 068 
9.0 
2. 170^ . 048 
26. 19 db .62 
High-oil. 
5- 207 ± .043 
5 -o 
i* 4 i 7 ± -030 
2.7. 2id: .63 
Low-oil. 
7. 7ii± .054 
7.0 
1. 863 ± .038 
24. 16 d: .52 
Rows of kernels on ears: 
High-protein.... 
13-360^: .046 
14. 0 
1. 668 ± .033 
12. 48± .25 
Low-protein. 
14.402 ± . 063 
14.0 
2. 048 ± .045 
14- 22 d: .32 
High-oil. 
14. 489 ± . 061 
16. 0 
1. 936 ± .043 
13- °°± • 29 
Low-oil. 
12. 684± . 044 
12. 0 
1. $52± .031 
12. 24db .25 
crop op 1915 
Length of ear, in inches: 
High-protein. 
7. i76d:o. 029 
7*5 
1. 173 d:0. 021 
16. 35 ±Q .29 
Low-protein. 
7- 859± . 034 
8.0 
1.23rd: .024 
15. 66± .31 
High-oil. 
7- 3S 8 ± • 028 
8.0 
1. 07id: . 020 
14. 56 ± .28 
Low-oil. 
7 - 1°3 ± • ° 3 S 
8.0 
1.1481b .025 
16. i6db . 35 
Circumference of ear, in 
inches: 
High-protein. 
5- 674 ± . 010 
5 - 75 
. 412 d: . 007 
7. 26± . 13 
Low-protein. 
6. 125± . 016 
6. 50 
• 583 ± *011 
9 * 5 2 d: .19 
High-oil. 
5. 781 ± . 012 
5 * 75 
. 468d: . 009 
8. iod: . 16 
Low-oil. 
6.453 d: .017 
6. 50 
. 592 d: • 012 
9. 17 d: . 19 
Weight of ear, in ounces: 
High-protein. 
7- 0761b .044 
7.0 
1. 66 g± . 031 
2 3 - 59 ± *47 
Low-protein. 
8.6851b .071 
10. 0 
2. 395d: .050 
27. 58d: .62 
High-oil. 
7-3611b .049 
7.0 
I. 801 d: .035 
24. 47 d: .50 
Low-oil. 
8.073 d: .072 
10. 0 
2.2941b .051 
28. 42 d: .68 
Rows of kernels on ears: 
High-protein. 
13.986 ± .041 
14. 0 
I. 588 ± .029 
11. 35± . 21 
Low-protein. 
iS-° 3 8 ± .053 
16. 0 
1. 8961b .037 
12. 6id: .25 
High-oil. 
15. 36o± .047 
16. 0 
2. 262 d: . 047 
14- 73 ± - 3 1 
Low-oil. 
i 4 -° 34 ± • °S 3 
14.0 
1.7i2db .037 
12. 20d= • 27 
