XIV 
Journal of Agricultural Research 
Vol. VII 
Relationship Between the Wetting Power and Efficiency of Nicotine- 
Sulphate and Fish-Oil-Soap Sprays 
Page 
Fig. i. Efficiency and wetting-power graphs for sprays in group i, containing 
io ounces of nicotine sulphate and varying quantities of soap, and 
group 4, containing various amounts of soap with no nicotine. 394 
2. Efficiency and wetting-power graphs for group 2, containing 5 pounds 
of soap, and group 3, containing 1 pound of soap plus varying amounts 
of nicotine sulphate. 397 
Life History and Poisonous Properties of Clavtceps paspali 
Fig. i. Clavtceps paspali: a , Mature ascus; b , ascus breaking up to liberate 
spores; c, ascospore. 402 
2. Claviceps paspali: Tip of tuft of hyphae, showing the production of 
sphacelia spores. 403 
Effect of Sodium Salts in Water Cultures on the Absorption of Plant 
Food by Wheat Seedlings 
Fig. 1. Graphs showing the effect of sodium chlorid in nutrient solutions on 
the nitrogen, potash, and phosphoric-acid content of wheat seedlings. 408 
2. Graphs showing the effect of sodium sulphate in nutrient solutions on 
the nitrogen, potash, and phosphoric-acid content of wheat seedlings. 409 
3. Graphs showing the effect of sodium carbonate on the nitrogen, potash*, 
and phosphoric-acid content of wheat seedlings. First series. 410 
4. Graphs showing the effect of sodium carbonate on the nitrogen, potash, 
and phosphoric-acid content of wheat seedlings. Second series. 411 
5. Graphs of the mean values of the first and second series showing the 
effect of sodium carbonate on the nitrogen, potash, and phosphoric- 
acid content expressed in percentage of the dry weight of wheat 
seedlings. 412 
6. Graphs showing the effect of sodium chlorid on the absorption of nutri¬ 
ents by wheat seedlings. 414 
7. Graphs showing the effect of sodium sulphate on the absorption of 
nutrients by wheat seedlings. 414 
8. Graphs showing the effect of sodium carbonate on the absorption of 
nutrients by wheat seedlings. 415 
Factors Affecting the Evaporation of Moisture from the Soil 
Fig. j. Evaporation from'Greenville loam containing different initial per¬ 
centages of moisture. 445 
2. Evaporation from sand containing different initial percentages of 
moisture.. 447 
3. Evaporation from clay containing different initial percentages of 
moisture. 448 
4. Evaporation from muck containing different initial percentages of 
moisture. 448 
5. Loss of moisture from Petri dishes containing different percentages of 
soil moisture and kept in a saturated and unsaturated atmosphere.. 449 
6. Evaporation of water from wet soils with different wind velocities.... 450 
7. Loss of water from soil and temperatures in the sun and under cheese¬ 
cloth and board shade... 451 
8. Time required at different temperatures to drive off half and all the 
water from Greenville loam containing 12 per cent moisture. 452 
