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Valley of Little Sioux River north of Fox Creek, Iowa, late 1890s or early 1900s

Valley of Little Sioux River north of Fox Creek, Iowa, late 1890s or early 1900s

Boulder of Iowan age, near the southeast corner of the park, Nora Springs, Iowa, late 1890s or early 1900s

Boulder of Iowan age, near the southeast corner of the park, Nora Springs, Iowa, late 1890s or early 1900s

Men and boys surrounding “Jumbo” artesian well, Belle Plaine, Iowa, late 1890s or early 1900s

Men and boys surrounding “Jumbo” artesian well, Belle Plaine, Iowa, late 1890s or early 1900s

Artesian well/Jumbo well, 3 ft in diameter at surface, 195 deep through fine sand and blue clay. Bored with 2 inch drill. Water broke out. pressure 35 lbs to sq in.
Initial steps in the formation of gulches in loess, Graham Township, Iowa, late 1890s or early 1900s

Initial steps in the formation of gulches in loess, Graham Township, Iowa, late 1890s or early 1900s

Located in section 20 of Graham Township.
Kames, Thornton, Iowa, late 1890s or early 1900s

Kames, Thornton, Iowa, late 1890s or early 1900s

Located northwest of Thornton.
Terrace of Wisconsin age near Lansing, Iowa, late 1890s or early 1900s

Terrace of Wisconsin age near Lansing, Iowa, late 1890s or early 1900s

Child near boulder in field, Newton Township, Iowa, late 1890s or early 1900s

Child near boulder in field, Newton Township, Iowa, late 1890s or early 1900s

Illinoian boulders, late 1890s or early 1900s

Illinoian boulders, late 1890s or early 1900s

Granite boulder belonging to Iowan Drift, Mason City, Iowa, late 1890s or early 1900s

Granite boulder belonging to Iowan Drift, Mason City, Iowa, late 1890s or early 1900s

Botanical Laboratory, south room, Old Science Hall

Botanical Laboratory, south room, Old Science Hall

Old Science Hall on the University of Iowa campus, Iowa City