Prairies, Flats, and Barrens in Southern Illinois. 395 
the winged elm (Uimus alata), the Spanish oak (Quercus falcata), 
the barren oak (bitter oak, Q. falcata var. triloba(?)), the beech 
(Fagus ferruginea), the cucumber tree (Magnolia acuminata), 
aud others. 
favor the precipitation of dew nearly as much as the grass. e 
] 
natural impediments to the speedy abduction of the falling rains _ 
are also lessened to a considerable degree, and thus the soil is 
rendered drier. The artificial works of drainage and even the 
: yhe 
sacrifice, and a remedy is accessible if only we will apply it. 
Am. Jour. Sct.—Seconp Serres, Vou. XXXVI, No. 108.—Nov., 1863, 
51 
. 
