Oct. 2-Dec. 26,1916 
Illustrations 
XIII 
Page 
Fig. 11. Graph showing a linear relation between the logarithm of the trans¬ 
piration-evaporation ratio of Sudan grass (grown in the open) and the 
time... , 197 
12. Graph showing a linear relation between the logarithm of the trans¬ 
piration-evaporation ratio of Algeria corn and the time. 198 
13. Graph showing a linear relation between the logarithm of the trans¬ 
piration-evaporation ratio of Northwestern Dent com and the time.. 199 
14. Graph showing a linear relation between the logarithm of the trans¬ 
piration-evaporation ratio of Minnesota Amber sorghum and the time. 199 
15. Graph showing a linear relation between the logarithm of the trans¬ 
piration-evaporation ratio of alfalfa (in the open) and the time. 200 
16. Observed daily ratios of transpiration to evaporation during early 
stages of growth of Sudan grass compared with exponential graph 
computed from the relationship shown in figure 11. 200 
17. Graphs of the daily ratios of the transpiration of the different crops 
grown in 1914 plotted logarithmically. 201 
18. Graphs of the daily ratios of the transpiration of the different crops 
grown in 1915 plotted logarithmically ... 203 
Spongospora subterranea and Phoma tuberosa on the Irish 
Potato 
Fig. i. Map of the experimental plots at Caribou, Me., showing their arrange¬ 
ment, distribution of Spongospora subterranea , percentage by weight 
of the progeny infected with the disease, and the yield per acre.... 239 
Grain op the Tobacco Leaf 
Fig. i. Curves plotting data relative to the burning quality of tobacco from 
fertilizer treatment at Red Lion, Pa., for crops of 1913 and 1914. ... 282 
2. Curves plotting data relative to the burning quality of the tobacco 
grown on fertilizer plots at Red Lion, Pa., in 1914.. 283 
Use of Two Indirect Methods for the Determination of the Hygro¬ 
scopic Coefficients of Soils 
Fig. i. Diagram showing the amounts of free water at different levels in eight 
fields, illustrating the concordance of the values obtained for the 
hygroscopic coefficient by calculation from the hygroscopic moisture 
with those directly determined.. 356 
Correlation Between the Size of Cannon Bone in the Offspring and 
the Age of the Parents 
Fig. i. Curve showing the percentages of mares with various-sized cannon 
bones, sired by stallions under 11 years old... 363 
2. The percentages of mares with various-sized cannon bones, sired by 
10 selected stallions when these were under 11 years old. 365 
3. The percentages of mares of various-sized cannon bones bred from 
dams under 11 years old. 365 
4. The percentages of mares of various-sized cannon bones bred from both 
parents under 11 years old.. 366 
5. The percentages of mares in various classes deviating from their dams 
when both parents were under 11 years old. 366 
