Written on the back of the photograph "Frank Campbell (L) and Dave Ogden (R) in Island Mountain Mill. 1936. Dorr Model "F" Multizone Classifier and Marcy No.64.5 ball mill." One photograph : b&w ; 3.5 x 5.75 inches. Collection of photographs donated by Dave Johnson (wp-200-307). Photographs date between 1930 and 1941.
Donated by: Dave Johnson