Three Boys at the Corn Thinning Camp in Luverne. Material: paper. Size: 5" x 3". Description: black and white photograph of three boys at the Corn Thinning Camp at Luverne, Minn., in 1930; shown are picnic tables, many trees, two or three tents, clothes hanging on a clothesline, a sign "Corn Variety Test, University of Minnesota, County Farm Bureau Cooperating"; identified boys standing beside the tents are Roy Myers, Andrew Downie, and Howard Ruliffson.