Contents: Field for Irrigation in Humid Climates --- Topography --- Rainfall --- Water Supply --- Meadow Irrigation (Lancaster County – Berks County – Lehigh County – Northampton County) --- Irrigation of Truck Farms (Detailed Descriptions of Irrigation Plants [Maryland – Pennsylvania – New Jersey – New York – Massachusetts – Rhode Island] – Methods of Irrigation) --- The Cost of Irrigation --- Returns from Irrigation --- Conclusion.