Despite the darkness of the sun in this 1930s print, it is neither a negative print nor an infrared print. The effect was made by using a long exposure, effectively 'burning out' the portion of the exposure where the sun appears.
Photography class, 1892. Standing (l to r): John Fulton, E.G. Emmett, Homer Lily, unidentified woman, unidentified woman. Seated (l to r): unidentified man, 2 unidentified women, W. Frank Holman, unidentified woman.
"Several courses in photography, both technical and non-technical, are offered by the Physics Department for this term. See Mr. Garman or Mr. Yunker, room 101 or 202 Apperson Hall."