Mechanical tests of pumps and pumping plants used for irrigation and drainage in Louisiana in 1905 and 1906
A U.S. Office of Experiment Stations engineering report by William B. Gregory, published in Washington in 1907, recording tests of irrigation and drainage pumping plants on Louisiana rice farms for agricultural engineers and planters. Line plates show paddle wheels, pump and valve assemblies in section and elevation, plus nomograms and cost-and-yield charts whose radiating rule-lines and grids suit diagrammatic backgrounds.
