J. W. Powell. 13th. Annual Report United States Geological Survey. 1891-92 Part I. Report of the director. Part II. Geology. Part III. Irrigation.
(Washington, 1893). I: 240 pages. In back pocket are two maps showing progress of geologic mapping and topographic surveys for 1891-92. II: 105 plates and 41 figures. 372 pages. In back pocket is one “Relief Map of the United States.” III: 76 plates and 118 figures. 486 pages. In back pocket are two folding maps, one of which is a large (31 x 47) map of the drainage basin of the Arkansas River. Maps excellent. (3 vols.)