Letter from A. F. Potter to Carl T. Hayden describing John H. Page's request to build a railway for the Canyon Copper Company as "impractical."

Letter from A. F. Potter to John H. Page referring his request to build a railway to the District Forester at Albuquerque, New Mexico.

Plan of Babel IIB Arcology city structure design by Paolo Soleri, from 1970 exhibit at Corcoran Gallery of Art, Washington, DC

Interior photograph of Solimene ceramics factory in Vietri sul Mare, Italy showing concrete pillars supporting the roof

Interior photograph of Solimene ceramics factory in Vietri sul Mare, Italy showing staircase

Model of Arcosanti Arcology city structure design by Paolo Soleri, from 1970 exhibit at Corcoran Gallery of Art, Washington, DC

Model of Arcosanti Arcology city structure design by Paolo Soleri, from 1970 exhibit at Corcoran Gallery of Art, Washington, DC

Plan of Logology city structure design by Paolo Soleri, from 1970 exhibit at Corcoran Gallery of Art, Washington, DC

Model of Arcosanti Arcology design by Paolo Soleri

Model of Babel IIB Arcology design by Paolo Soleri at an exhibition