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.
The Lady of the Fountain was a statue on OAC's lower campus, and a favored subject of Garman's. The statue was destroyed by vandals in the early 1930s. All of the photos of the Lady in Garman's collection are from the 1920s.
This type of image is called a photo-relief or bas relief. Photo-reliefs are made by exposing an image by contact to film, emulsion side to emulsion side, to get an image reversal. The two images are then slightly offset from each other, and a print is made from the two pieces. Because of the reversal on the second image, only the edges and highlights are not neutralized.
Rook Bonfire, 1940.