1917] GANO & MCNEILL—EVAPORATION RECORDS 329 
holds, the oaks showing a higher winter rate than the pines. The 
two pine forests (short-leaved and long-leaved) on dry soil are 
nearest together in their evaporation rates during the spring. A 
comparison of the three pine associations and the two oak asso- 
Ciations as charted will show these relations (figs. 3, 4). 
The Leon Sand forest is singular in that it is so directly related 
to the soil moisture, and although all other factors tend to make 
the evaporation excessive, the constant humidity near the soil 
surface of the ground, owing to the soil saturation, modifies the 
curve until it is the most equable of any of those described in this 
report. 
Ricumonp, Inp. 
