Bu'. 304, U. S. Dept. of Agriculture. 
Plate VIII. 
Fig. 1 .—Rear of Pumping Plant, Louisa-Des Moines Drainage District, Showing 
Suction Pit. 
Fig. 2.— Wooden Forms for Concrete Suction Pipes for Pumping Plant on 
Muscatine-Louisa Levee and Drainage District. 
