^^!is^wffi?x?r 



Plate VIII. 



Fig. 1.— View across Bayou Walnut, after clearing, 1,000 yards above site of dam. 



Fig. 2. — Looking up channel of Bayou Walnut, after first rise of water, from point 300 yards 

 above site of dam. Note "floatage'' along margin. Compare with Plate IV, Figure 1, and 

 Plate V, Figure 2. 



Fig. 3.^View above dam. Bayou Walnut, with bayou filled with water. Compare with Plate V, 



Figure 3. 



IMPOUNDING WATER TO CONTROL MALARIA MOSQUITOES. 



