Bui. 1098, U. S. Dept of Agriculture. 



PLATE IV. 



Fig. 1. — Looking down channel of Bayou Walnut, 300 yards above site of dam, before clearing. 



Fig. 2. — Looking across Bayou Walnut, .500 yards above site of dam, before clearing. 



Fig. .3. — Looking across Bayou Walnut, 900 yards above site of dam, before clearing. 

 IMPOUNDING WATER TO CONTROL MALARIA MOSQUITOES. 



