C. N. Johnston

1898

• A new irrigation float meter for concrete pipe lines
• A new portable field water meter and a new furrow water meter
• Irrigation pumps
• Irrigation wells and well drilling
• Portable irrigation siphon and a new priming valve for siphons
• Principles governing the choice, operation and care of small irrigation pumping plants
• Farm irrigation structures
• Irrigation pumps
• Irrigation wells and well drilling
• Irrigation wells and well-drilling methods in California