Title: Photographs Showing Landscapes, Geological and Other Features, of Portions of the Western Territory of the United States, Obtained in connection with Geographical and Geological Explorations and Surveys West of the 100th Meridian, Seasons of 1871, 1872 and 1873
Object type: Album; Photographs
Date: 1871–73
Artist:  Timothy H. O'Sullivan 
Artist bio: American, born Ireland, 1840–1882
Artist nationality: American, born Ireland
Artist role: Artist
Medium: Albumen silver prints from glass negatives
Dimensions: Image (each, approximately): 10 7/8 × 7 7/8 in. (27.6 × 20 cm)
Sheet (each, approximately): 10 7/8 × 7 7/8 in. (27.6 × 20 cm)
Printed Border (each): 14 × 11 in. (35.6 × 28 cm)
Mount (each): 21 1/4 × 16 3/4 in. (54 × 42.6 cm)
Overall: 21 7/8 × 18 3/4 × 3 in. (55.5 × 47.6 × 7.6 cm)
Classification: Albums
Credit line: Gilman Collection, Purchase, The Horace W. Goldsmith Foundation Gift, through Joyce and Robert Menschel, 2005
Department: Photographs
Repository: Metropolitan Museum of Art, New York, NY