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Falls in Carboniferous forms on Indian Spring, Burlington, Iowa, late 1890s or early 1900s

Falls in Carboniferous forms on Indian Spring, Burlington, Iowa, late 1890s or early 1900s

Exposure of Upper Coal Measures and Carboniferous, Hawleyville, Iowa, late 1890s or early 1900s

Exposure of Upper Coal Measures and Carboniferous, Hawleyville, Iowa, late 1890s or early 1900s

Men by conglomerate basal with lentils of unconformity near base, Montpelier, Iowa, late 1890s or early 1900s

Men by conglomerate basal with lentils of unconformity near base, Montpelier, Iowa, late 1890s or early 1900s

Concretionary structure in Carboniferous near Prairie Creek, Iowa, late 1890s or early 1900s

Concretionary structure in Carboniferous near Prairie Creek, Iowa, late 1890s or early 1900s

Unconformity between Carboniferous and Devonian, Montpelier, Iowa, late 1890s or early 1900s

Unconformity between Carboniferous and Devonian, Montpelier, Iowa, late 1890s or early 1900s

Thin bedded Niagara and flagstone beds of Syringopora tenella zones in the upper cliffs, Jefferson Township, Balltown, Iowa, late 1890s or early 1900s

Thin bedded Niagara and flagstone beds of Syringopora tenella zones in the upper cliffs, Jefferson Township, Balltown, Iowa, late 1890s or early 1900s

Cliffs, Clay Mill, Iowa, late 1890s or early 1900s

Cliffs, Clay Mill, Iowa, late 1890s or early 1900s

Photograph taken from Mill.
Homeopathic Medical Hospital, Summer

Homeopathic Medical Hospital, Summer

Hospital, on corner of Jefferson and Dubuque Streets. University of Iowa campus, Iowa City
Old Science Hall, in old postition, from the southwest

Old Science Hall, in old postition, from the southwest

Old Science Hall on the University of Iowa campus, Iowa City. Photograph taken in fall.
West wall of "Devil's Backbone" canyon, Dundee, Iowa, late 1890s or early 1900s

West wall of "Devil's Backbone" canyon, Dundee, Iowa, late 1890s or early 1900s