. Studies in natural history. Natural history; Natural history. EROSIONAL HISTORY OF DRIFTLESS AREA 17. Fig. 4. A-series of plats of stream courses of different histories. ^nM^cSS T+thi? C°UrSe °f Mapie river taken from the Casselton, No. Dak. topo- Sef on low, fiat * COnSGQUent COUrse in youth of its first cycle. Curves devel- gJlacia?0drCift^Ver' Wat*rl°°' Wis' sheet" A consequent stream on the surface of and topography^61'' Wilmington' Vt' sheet- A stream in harmony with rock hardness DD Platte river, Leavenworth, Kas. sheet. Meanders developed in old age &E Big Sioux river,

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. Studies in natural history. Natural history; Natural history. EROSIONAL HISTORY OF DRIFTLESS AREA 17. Fig. 4. A-series of plats of stream courses of different histories. ^nM^cSS T+thi? C°UrSe °f Mapie river taken from the Casselton, No. Dak. topo- Sef on low, fiat * COnSGQUent COUrse in youth of its first cycle. Curves devel- gJlacia?0drCift^Ver' Wat*rl°°' Wis' sheet" A consequent stream on the surface of and topography^61'' Wilmington' Vt' sheet- A stream in harmony with rock hardness DD Platte river, Leavenworth, Kas. sheet. Meanders developed in old age &E Big Sioux river, Elkpoint, So. Dak. sheet. Meanders developed in old Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original University of Iowa; State University of Iowa; Making of America Project. Iowa City, Ia

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectnaturalhistory, booky