Historic Hood River
This is a good example of a steam powered sprayer for orchard use. The boiler was a “Little Giant.” I’ll bet it was a challenge to keep this apparatus working. Anything with two pressure gauges, two belts, multiple valves and an oil can has to be fun.
We don’t know whose orchard this was or the year, but those are apples.
That flare at the bottom of the image looks like a “light leak” in the camera.