If you would like to view physical copies of The Sphere, please visit the institutions listed below, which all have complete-as-possible boxed sets in their collections. They will be pleased to show them to you.
Golda Meir Library, Special Collections, UW-Milwaukee
Kohler Art Library, UW-Madison
Murphy Library, Special Collections, UW-La Crosse
Richard E. & Lucille Krug Rare Books Collection, Milwaukee Public Library
Milwaukee County Historical Society
If you would like to purchase a complete-as-possible boxed set for you own collection, please contact me.