George Koolery is pictured in the mouth of a mine. Notice the mining car which was used to haul the ore out of this hard rock mine.
Pictured is two hydrolic monitor nozzles for canvas hoses. circa 1860. These nozzles are owned by the author.
These nozzles were used to funnel the flummed water pressure onto the ancient gravel deposits. The water knocked down the banks and was channeled into sluice boxes where the gold was extracted.
See the top of this page where the water is spraying from a nozzle similar to the ones displayed.