Suggested techniques, equipment, and standards for the testing of hand insecticide-spraying equipment.

The new demands placed upon application equipment by the introduction of modern insecticides have revealed the deficiencies of this equipment when required for continuous use on a large scale. If adequate equipment is to be produced, specifications must be based not only on basic materials tests but also on "use" tests, in which the conditions of field use are simulated.THE AUTHOR OUTLINES SUGGESTED TECHNIQUES TO BE FOLLOWED AND STANDARDS TO BE ADOPTED IN TESTING THE PERFORMANCE OF COMPRESSION SPRAYERS AND ALLIED EQUIPMENT, WITH REFERENCE TO THE FOLLOWING FEATURES: compression-sprayer tank fatigue; tank impact; pump resistance to bursting; pump resistance to collapse; pump friction; cut-off valve durability; constant-pressure valves; cut-off valve actuation; hose flexure; hose tension and bursting-pressure; hose friction; gaskets, valve faces, and similar non-metallic parts; nozzle-orifice erosion; and nozzle pattern.