Description from the back of the photograph: "scabbing," shown on this hop pole, is a substitute for peeling tops of posts. A drawknife is used to pull off two or three narrow strips of bark. Loosens bark, helps to dry out the top, thereby reducing decay."
"Note Y's used to divide dust stream. Also note that this old type duster with dust entering air-stream after air leaves the fan. This type is quite inferior to the newer types which thoroughly mix the air and the dust by passing through the fan." From the report "Hop pests and their control: A Report of the Control of the Hop Red Spider and Other Closely Related Problems During the Season of 1940," Morrison, H.E.; Vertrees, J.D. (Jack)
From the report, "Hop pests and their control: A Report of the Control of the Hop Red Spider and Other Closely Related Problems During the Season of 1940," Morrison, H.E.; Vertrees, J.D. (Jack)
Chittenden Hop Ranch, Salem, Oregon. From the report "Hop pests and their control: A Report of the Control of the Hop Red Spider and Other Closely Related Problems During the Season of 1940," Morrison, H.E.; Vertrees, J.D. (Jack)