2 vols. incl. the atlas. Text vol. is: xxxv, 260, x, [1] pp. Illus. with 43 plates, most from photographs, 4 are color lithographed geologic sections. 11¾x8¾, black cloth, spine lettered in gilt. Atlas is: Title sheet, contents sheet & legend sheet + 27 color lithographed plates (2 of them double-page), being topographical maps, elevations, plans, etc. 21x18, black cloth lettered in gilt. First Edition.

Detailed monograph on the mining district of Aspen, Colorado, now the winter playground of the wealthy and priviledged. The numerous photo plates provide a detailed views of the physical features of the regions, and the bright lithographed plates in the atlas depict the various geologic strata and topography of the district, along with plans of the mines.