oct. i-Dec.31,1917 Illustrations xi 
Page 
Fig. 8. Graphs showing the standard deviation of the rows of kernels on the 
ears in the four Illinois strains of Indian com for 11 crops, 1905-1915. 121 
9. Graphs showing the mean length of the ears in the two-ear strains of 
Indian com, 1908-1916. 123 
10. Graphs showing the mean circumference of the ears in the two-ear 
strains of Indian com, 1908-1916.. 123 
11. Graphs showing the mean weight of the ears in the two-ear strains of 
Indian com, 1908-1916... 124 
12. Graphs showing the mean number of rows of kernels in the two-ear 
strains of Indian com, 1908-1916... 124 
13. Graphs showing the standard deviation of the length of the ears in the 
two-ear strains of Indian com, 1908-1916... 132 
14. Graphs showing the standard deviation of the circumference of the 
ears in the two-ear strains of Indian com, 1908-1916. 132 
15. Graphs showing the standard deviation of the weight of the ears in the 
two-ear strains of Indian com, 1908-1916... 133 
16. Graphs showing the standard deviation of the number of rows of ker¬ 
nels in the two-ear strains of Indian com. 133 
17. Graphs showing the mean length of the ears of the erect- and declin¬ 
ing-ear strains of Indian com. 134 
18. Graphs showing the mean circumference of the ears of the erect- and 
declining-ear strains of Indian corn. 134 
19. Graphs showing the mean weight of the ears of the erect- and declin¬ 
ing-ear strains of Indian com. 135 
20. Graphs showing the mean number of rows of kernels on the ears of the 
erect- and declining-ear strains of Indian com. 135 
21. Graphs showing the standard deviation of the length of the ears of the 
high- and low-ear strains of Indian com. 140 
22. Graphs showing the standard deviation of the circumference of the 
ears of high- and low-ear strains of Indian com. 140 
23. Graphs showing the standard deviation of the height of the ears of 
high- and low-ear strains of Indian com. 141 
24. Graphs showing the standard deviation of the number of rows of ker¬ 
nels on the ears of high- and low-ear strains of Indian com. 141 
Fungus Fairy Rings in Eastern Colorado and theie Effect on 
Vegetation 
Fig. i. A sketch of a fairy ring produced by Marasmius oreades . 197 
2. A map of an area of 400 by 620 meters, lying just west of the experi¬ 
ment station and north of the Chicago, Burlington & Quincy R. R., 
near Akron, Colo. 199 
3. A sketch showing the different zones in a typical ring formed by A gar- 
icus tabularis . 200 
4. A bisect of the Agaricus tabularis ring shown in figure 3 at A. 201 
5. Sketch of a ring produced by Calvatia cyathiformis . 202 
6. A bisect of a ring sketched in figure 5. 203 
7. A sketch of a fairy ring formed by Lepiota morgani southeast of Yuma, 
Colo. 204 
8. Remapped area shown in figure 2. 205 
9. A ring formed by Calvatia cyathiformis , almost complete and 65 meters 
in diameter. 207 
10. This Agaricus tabularis ring was partly within a cornfield and partly 
within the native short-grass sod. 214 
