Kaufmann House Bear Run, PA Frank Lloyd Wright 35mm Glass Slides Lot of 101. 35mm glass enclosed slides in metal and plastic mounts, in good vintage condition with some wear. Measures 2″ x 2″. Slides were part of a retired collection from a university art/architecture/design image collection. All items are pictured and described to the best of our ability. It is your responsibility to ask all questions before purchasing.