One of the group of Pagosa Hot Springs, showing incrustation on the surface. Much prized by the Indians and miners on account of supposed healing qualities. Principal mineral element, Sulphate of Soda, No. 38 from the series "Geographical Explorations and Surveys West of the 100th Meridian"
1874
Timothy O'Sullivan (American, born Ireland, 1840–1882) commissioned by George Wheeler for the War Department, Corps of Engineers, U.S. Army
United States
Albumen print, stereo