Here John is spraying. The nozzle was adjustable to help disperse the insecticide. We would also drive around the camp grounds,
when campers were not there, like Saturday afternoon or evening, to do our spraying. Since the load was so heavy, the truck engine would overheat.
We would pull up to a garden hose by the pump house, open the pet cock on the bottom of the radiator,
open the top of the radiator and flush out the running engine with cold water. Then it was off to more spraying.
Certainly could not do that with a modern truck.