See eaiior 
Bul. 1098, U. S. Dept. of Agriculture. PLATE III. 
Fic. 1.—View along edge of Bayou Walnut, natural conditions, showing open water in channel 
with grass-grown margin. 
Fig. 2.—View along channel of Bayou Walnut, natural conditions, showing clean margin on 
opposite bank and vegetation along margin in immediate foreground. 
Fig. 3.—Looking across Bayou Walnut, 200 yards above site of dam, before clearing. 
IMPOUNDING WATER TO CONTROL MALARIA MOSQUITOES. 
